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Dell OptiPlex GXa and OptiPlex NX Systems Service Manual

Microprocessor

To take advantage of future options in processor speed and functionality, you
can replace the microprocessor on your system board with any Dell-supported
microprocessor upgrade. The microprocessor upgrade kit is shipped with an
SEC cartridge/heat sink assembly, which includes the microprocessor, micro-
processor heat sink, and L2-cache memory module.

You may also have to reseat or replace an SEC cartridge/heat sink assembly
during normal maintenance.

SEC Cartridge/Heat Sink Assembly

Figure 5-22. SEC Cartridge/Heat Sink Removal

SEC cartridge
release latches (2)

heat sink

SEC cartridge

guide bracket assembly

metal standoffs (2)

heat sink clips (2)

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Summary of Contents for OptiPlex GXa

Page 1: ... HOO 2SWL3OH D DQG 2SWL3OH 1 6 VWHPV 6 59 0 18 ...

Page 2: ...Pentium are registered trademarks and MMX is a trademark of Intel Corporation Microsoft Windows and MS DOS are registered trademarks of Microsoft Corporation IBM is a registered trademark of International Business Machines Corporation 3Com is a registered trademark of 3Com Corporation Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks a...

Page 3: ...udio Controller 1 5 Built In Ethernet NIC Support Optional on EM System Board 1 5 Network Cable Requirements 1 6 Full Set of I O Ports 1 6 Universal Power Supply 1 7 Location of Major Components 1 7 Advanced Expansion Features 1 11 OptiPlex NX Computer s Expansion Card Slot 1 12 Low Profile Computer s Expansion Card Slots 1 12 Midsize Computer s Expansion Card Slots 1 13 Mini Tower Computer s Expa...

Page 4: ...Pin Assignments for the DC Power Connectors 1 25 DC Power Distribution 1 26 OptiPlex NX Computer Power Supply 1 32 OptiPlex NX Pin Assignments for the DC Power Connectors 1 33 DC Power Distribution for the OptiPlex NX 1 34 Technical Specifications 1 36 Chapter 2 Basic Troubleshooting 2 1 Initial User Contact 2 1 External Visual Inspection 2 2 Observing the Boot Routine 2 3 Internal Visual Inspecti...

Page 5: ...ol Panel 4 7 Drives 4 8 3 5 Inch Diskette Drive Assembly 4 9 5 25 Inch Drive Assembly 4 10 Hard Disk Drive Assembly 4 11 System Power Supply 4 12 Expansion Cards 4 13 Expansion Card Cage 4 13 Expansion Card 4 14 Riser Board 4 15 System Board 4 16 System Board Components 4 17 DIMMs 4 18 Video Memory 4 18 Microprocessor 4 20 SEC Cartridge Heat Sink Assembly 4 20 System Battery 4 21 Chapter 5 Removin...

Page 6: ... Supply 5 14 Expansion Cards 5 15 Expansion Card Cage 5 15 Expansion Card 5 16 Riser Board 5 17 System Board 5 18 System Board Components 5 19 DIMMs 5 20 Video Memory 5 20 Microprocessor 5 22 SEC Cartridge Heat Sink Assembly 5 22 System Battery 5 23 Chapter 6 Removing and Replacing Parts on the Mini Tower Chassis 6 1 Recommended Tools 6 1 Precautionary Measures 6 2 Inside the Computer 6 3 Computer...

Page 7: ...nents 6 22 DIMMs 6 23 Video Memory 6 23 Microprocessor 6 25 SEC Cartridge Heat Sink Assembly 6 25 System Battery 6 26 Chapter 7 Removing and Replacing Parts on the Net PC Chassis 7 1 Recommended Tools 7 1 Precautionary Measures 7 2 Stand for Vertical Orientation 7 2 Computer Cover 7 3 Control Panel 7 5 Hard Disk Drive 7 6 System Power Supply 7 7 System Board Components 7 8 Expansion Card Cage 7 8 ...

Page 8: ...2 1 14 Figure 1 12 EM Riser Board for the Midsize Computer 1 14 Figure 1 13 Riser Board for the Mini Tower Computer 1 15 Figure 1 14 EM Riser Board for the Mini Tower Computer 1 15 Figure 1 15 System Board Components 1 18 Figure 1 16 System Board Jumpers 1 19 Figure 1 17 Computer Orientation Information 1 22 Figure 1 18 DC Power Connector P1 1 25 Figure 1 19 DC Power Connectors P2 Midsize and Mini...

Page 9: ... 11 Figure 4 10 System Power Supply Removal 4 12 Figure 4 11 Expansion Card Cage Removal 4 13 Figure 4 12 Expansion Card Removal 4 14 Figure 4 13 Riser Board Removal 4 15 Figure 4 14 System Board Removal 4 16 Figure 4 15 System Board Components 4 17 Figure 4 16 DIMM Removal 4 18 Figure 4 17 DIMM Installation 4 18 Figure 4 18 Installing a Video Memory Upgrade Module 4 19 Figure 4 19 SEC Cartridge H...

Page 10: ...ront Panel Insert Removal 6 8 Figure 6 7 Control Panel Removal 6 9 Figure 6 8 Drive Hardware 6 10 Figure 6 9 3 5 Inch Diskette Drive Assembly Removal 6 11 Figure 6 10 3 5 Inch Diskette Drive Bracket 6 12 Figure 6 11 5 25 Inch Drive Assembly Removal 6 13 Figure 6 12 5 25 Inch Drive Removal 6 14 Figure 6 13 Hard Disk Drive Bracket Removal 6 15 Figure 6 14 Hard Disk Drive Removal 6 16 Figure 6 15 Sys...

Page 11: ...ure 7 13 Installing a Video Memory Upgrade Module 7 13 Figure 7 14 SEC Cartridge Heat Sink Removal 7 14 Figure 7 15 System Board Removal 7 15 Figure 7 16 System Battery Installation 7 16 Figure A 1 System Setup Screens A 2 Tables Table 1 1 System Board Jumper Descriptions 1 20 Table 1 2 Interrupt Assignments 1 20 Table 1 3 DREQ Line Assignments 1 21 Table 1 4 OptiPlex GXa DC Voltage Ranges 1 24 Ta...

Page 12: ...compatible PCs and prior training in IBM compatible PC troubleshooting techniques In addition to information provided in this manual and the online System User s Guide Dell provides the Diagnostics and Troubleshooting Guide for troubleshooting procedures and instructions on using the Dell Diagnostics to test the computer system WARNING A WARNING indicates the potential for bodily harm and provides...

Page 13: ...support for an optional Network Interface Card with Wake up On LAN capability All OptiPlex NX systems use the EM system board Enhanced manageability systems are identified by the phrase Enhanced Man ageability which is printed on the computer s FCC label and also displayed in the boot banner when the computer is powered up The OptiPlex GXa systems are available in three different chassis configura...

Page 14: ... diskette CD ROM or tape drives Physical size and power supply types the midsize and mini tower systems use the same power supply NOTE Computers with Enhanced Manageability support contain a different system board riser board and a power supply with a secondary winding that provides trickle flea power for the Wakeup On LAN feature when computer power is turned off Due to the physical differences i...

Page 15: ...ll systems in the OptiPlex GXa and OptiPlex NX computer families incorpo rate the Pentium II microprocessor for improved operating speeds and overall performance Some of the major enhancement features of the Pentium II micro processor include internal 16 KB data and instruction caches internal math coprocessor and the MMX instruction set for high performance in complex multimedia and communication...

Page 16: ...E interface IDE2 also provides support for up to two high performance EIDE devices typically EIDE tape drives or CD ROM drives NOTES Any externally accessible drive bays at the front of the computer are normally used for diskette drives CD ROM drives and or tape drives Hard disk drives should be installed in the internal hard disk drive positions described in Hard Disk Drive Service Information fo...

Page 17: ...56 col ors noninterlaced and 1024 x 768 pixels with 65 536 colors noninterlaced The SVGA subsystem consists of the following major components ATI 3D Rage Pro SVGA video controller 2 MB synchronous graphics random access memory SGRAM video memory expandable to 4 MB via a video memory upgrade kit 15 hole monitor port Built In Audio Controller The built in audio controller is a single chip that conne...

Page 18: ...lded twisted pair UTP Ethernet cable The other end of the cable con nects to an RJ45 jack wall plate or to an RJ45 port on a UTP concentrator or hub depending on the network configuration Chapter 4 Using Integrated Devices in the Reference and Installation Guide provides instructions for connecting the computer to and configuring it for use on an Ethernet network For OptiPlex NX systems refer to t...

Page 19: ...hassis configurations is a higher capacity power supply than that used in the low profile and NX chassis configurations Dell OptiPlex GXa systems equipped with the EM system board and all OptiPlex NX systems have a special power supply that provides trickle flea power to support the Wakeup On LAN feature when computer power is off Location of Major Components Figure 1 2 shows the front panel featu...

Page 20: ...cess indicator power button power indicator diskette drive access indicator reset button hard disk drive access indicator power button power indicator Midsize Chassis Low Profile Chassis power indicator hard disk drive access indicator power button reset button Mini Tower Chassis Net PC Chassis hard disk drive access indicator power button power indicator ...

Page 21: ... diskette tape drive interface cable audio connectors 3 parallel port connector NIC connector optional mouse connector padlock ring security cable slot parallel port connector power supply voltage selection switch AC power receptacle serial port 1 connector USB connectors 2 keyboard connector mouse connector NIC connector optional drive cage diskette tape drive interface cable hard disk drive brac...

Page 22: ...ity cable slot serial port 2 connector AC power receptacle parallel port connector USB connectors mouse connector keyboard connector serial port 1 connector video connector audio connectors 3 padlock ring system board expansion card cage riser board hard disk drive bracket external drive bays interface cable NIC connector optional ...

Page 23: ...tion Guide describes the ICU and provides instructions for using it to configure the computer In the Microsoft Windows 95 operating system the functions provided by the ICU are handled by the Device Manager which can be accessed by double clicking the System icon in the Control Panel See your Windows 95 documentation for instructions on using the Device Manager to manage resources and resolve conf...

Page 24: ...Plex GXa low profile computers have three expansion card slots The riser board has two ISA expansion card connectors and two PCI expansion card connectors One PCI expansion card connector and one ISA expansion card connector share a single expansion card slot resulting in a total of three expansion card slots see Figure 1 8 The low profile computers have a passive riser board with no PCI to PCI br...

Page 25: ...nector share a single expansion card slot resulting in a total of five expansion card slots see Figure 1 10 Option 2 is an active riser board with a PCI to PCI bridge Option 2 has two ISA expansion card connectors and five PCI expansion card connectors Two PCI ISA expansion card connector pairs each share an expansion card slot again resulting in a total of five expansion card slots see Figure 1 1...

Page 26: ...i Tower Computer s Expansion Card Slots The mini tower computers have seven expansion card slots The riser board has four ISA expansion card connectors and five PCI expansion card connectors Two PCI expansion card connectors share expansion card slots with two ISA connectors resulting in a total of seven expansion card slots see Figure 1 13 The riser board is active incorporating PCI to PCI bridgi...

Page 27: ...riser cable and an LED see Figure 1 14 If the LED is on the riser is receiving power if off the riser is not receiving power Figure 1 14 EM Riser Board for the Mini Tower Computer ISA4 connector ISA3 connector ISA1 connector PCI3 connector PCI2 connector PCI1 connector PCI4 connector ISA2 connector PCI5 connector HDLED connector ISA4 ISA1 HDLED connector P1 PCI1 PCI5 ISA2 PCI2 PCI3 ISA3 LED PCI4 ...

Page 28: ...to a total memory capacity of 384 MB Main memory can have either 72 bit parity ECC DIMMs or 64 bit nonparity DIMMs Video Memory Upgrade Option You can upgrade video memory from 2 to 4 MB by installing an optional video memory upgrade module in the video memory upgrade socket on the system board Adding video memory increases the system s video performance and provides additional modes for high reso...

Page 29: ... aid in troubleshoot ing all major components of the three Dell OptiPlex GXa chassis server based diagnostics are available only for those systems equipped with enhanced man ageability support The OptiPlex NX systems use server based diagnostics hard disk based diagnostics or the diskette based diagnostics using an external diskette kit con nected directly to the system board See Running the Syste...

Page 30: ...er input connector POWER_1 SEC cartridge connector SLOT1 DIMM sockets 3 DIMM_A DIMM_C front of computer CD ROM audio interface connector CD_IN video memory upgrade socket VIDEO_UPGRADE line in jack LINE IN line out jack LINE OUT microphone jack MIC Optional NIC connector ENET video connector MONITOR microprocessor fan connector FAN serial port 2 connector SERIAL2 USB connectors USB keyboard mouse ...

Page 31: ...System Overview 1 19 System Board Jumpers Figure 1 16 System Board Jumpers ...

Page 32: ...l to enable the password feature default One set of speed jumpers must have a jumper plug installed otherwise the system defaults to 233 MHz Table 1 2 Interrupt Assignments IRQ Line Used By Available IRQ0 Generated by system timer IRQ1 Generated by keyboard controller to indicate that keyboard s out put buffer is full IRQ2 Generated internally by interrupt controller to enable IRQ8 through IRQ15 I...

Page 33: ...ondary EIDE port to indicate that device requires service If the EIDE controller is dis abled this line is available for other use NOTE If an ISA expansion card is configured for IRQ11 the optional NIC or PCI IRQ is assigned to another available IRQ line Table 1 3 DREQ Line Assignments DREQ Line Used By Available DREQ0 Available DREQ1 Available DREQ2 Generated by super I O controller to initiate D...

Page 34: ...ni tower computers NOTE Throughout this manual references to component locations assume the chassis orientations illustrated in Figure 1 17 Figure 1 17 Computer Orientation Information Hard Disk Drive for the Net PC Computer One 1 inch high EIDE hard disk drive can be mounted to the top of the expansion card cage right side left side front back left side front right side back Low Profile and Net P...

Page 35: ...ard disk drives or one 1 inch high EIDE or SCSI hard disk drive and one 1 6 inch high EIDE or SCSI hard disk drive Power Supply Service Data The low profile computers have a 145 W system power supply the midsize computers have a 200 W system power supply and the mini tower computers have a 230 W power supply All system power supplies can operate from an AC power source of 115 VAC at 50 to 60 Hz or...

Page 36: ...3 0 A2 low profile computers 6 0 A2 midsize and mini tower computers 12 VDC 10 80 to 13 20 VDC 0 3 A low profile computers 0 3 A midsize and mini tower computers 5 VDC 4 50 to 5 50 VDC 0 3 A low profile computers 0 3 A midsize and mini tower computers 5 VFP3 4 75 to 5 25 VDC 10 mA 1 The combined load on the 5 VDC and 3 3 VDC outputs should not exceed 105 W on the low profile computers or 140 W on ...

Page 37: ...ure between 4 and 5 VDC when the power supply is on and operating to indicate that all power supply output voltages are within ranges specified in Table 1 4 Figure 1 18 DC Power Connector P1 Figure 1 19 DC Power Connectors P2 Midsize and Mini Tower Chassis P3 P4 P5 P6 and P9 All OptiPlex GXa Chassis 11 1 PWRGOOD 3 orange 12 VDC blue 12 VDC yellow 5 VFP purple common black 2 3 4 5 6 7 8 9 10 12 13 ...

Page 38: ...igures 1 21 through 1 25 provide the following information about DC power distribution Power supply connector identification Power cable connections for diskette tape CD ROM and hard disk drives Power distribution to sockets and connectors on the system board 1 2 3 4 3 3 VDC blue white common black common black 5 P2 P7 6 3 3 VDC blue white 3 3 VDC blue white common black ...

Page 39: ...System Overview 1 27 Figure 1 21 DC Power Cables for the Low Profile Computer P5 P4 P3 P2 P1 ...

Page 40: ...C 12 VDC 12 VDC PSON 5 VFP 5 VDC 5 VDC 12 VDC 12 VDC P3 5 VDC 12 VDC 12 VDC 12 VDC 12 VDC 12 VDC 3 5 inch diskette system power supply battery 5 VDC 5 VDC ISA1 ISA2 PCI1 PCI2 MICROPROCESSOR PANEL KYBD MOUSE DIMM_A DIMM_B DIMM_C main memory sockets P4 FAN RISER optional drive P5 riser board system board internal hard disk drive POWER2 processorcore regulator 5 VDC USB 3 3 VDC P1 only on EM systems ...

Page 41: ...System Overview 1 29 Figure 1 23 DC Power Cables for the Midsize and Mini Tower Computers P7 P9 P5 P4 P3 P2 P1 P6 ...

Page 42: ... P3 5 VDC 12 VDC 12 VDC 12 VDC 3 5 inch diskette drive battery P1 ISA1 through ISA3 PCI1 through PCI3 MICROPROCESSOR PANEL KYBD MOUSE DIMM_A DIMM_B main memory sockets P4 FAN RISER internal hard disk drive P2 optional drive P5 P6 riser board system board optional drive internal hard disk drive processor core regulator POWER2 core VCC 2 1 to 3 5 VDC USB 3 3 VDC Some computers have an additional con...

Page 43: ...C 3 VDC keyboard controller P3 5 VDC 12 VDC 12 VDC 12 VDC 3 5 inch diskette drive battery P1 ISA1 through ISA4 PCI1 through PCI5 MICROPROCESSOR PANEL KYBD MOUSE DIMM_A DIMM_B main memory sockets P4 FAN RISER internal hard disk drive P2 optional drive P5 P6 riser board system board optional drive internal hard disk drive processor core regulator POWER2 core VCC 2 1 to 3 5 VDC USB 3 3 VDC P9 optiona...

Page 44: ...di tion Therefore when you measure these voltages the DC power connectors must be connected to their corresponding power input connectors on the system board and hard disk drive Table 1 5 OptiPlex NX DC Voltage Ranges Voltage Range Maximum Output Current1 3 3 VDC 3 14 to 3 47 VDC 6 0 A1 5 VDC 4 75 to 5 25 VDC 12 0 A1 12 VDC 11 40 to 12 60 VDC 1 0 A2 12 VDC 10 80 to 13 20 VDC 0 5 A 5 VFP3 4 75 to 5...

Page 45: ...supply fan speed 3 Pin 5 PWRGOOD should measure between 4 and 5 VDC when the power supply is on to indicate that all power supply output voltages are within the ranges specified in Table 1 5 Figure 1 26 DC Power Connector P1 for the OptiPlex NX Figure 1 27 DC Power Connector P2 for the OptiPlex NX 11 1 PWRGOOD 3 orange 12 VDC blue 12 VDC yellow 5 VFP purple common black 2 3 4 5 6 7 8 9 10 12 13 14...

Page 46: ...Figures 1 29 and 1 30 provide the following information about DC power distribution Power supply connector identification Power cable connection for the hard disk drive Power distribution to sockets and connectors on the system board Figure 1 29 DC Power Cables for the OptiPlex NX Computer 1 2 3 4 5 VDC red common black common black 12 VDC yellow P3 P3 P2 P1 ...

Page 47: ...DC PWRGOOD P1 POWER_1 PSON 5 VFP 5 VDC 12 VDC 12 VDC PSON 5 VFP 5 VDC 12 VDC 12 VDC P3 12 VDC 12 VDC 12 VDC computer power supply battery 3 3 VDC 5 VDC PCI1 MICROPROCESSOR PANEL KYBD MOUSE DIMM_A main memory sockets FAN RISER riser board system board POWER_2 processor core regulator 5 VDC USB internal hard disk drive P1 NOTE 5VFP is routed to the integrated NIC logic on the system board and to P1 ...

Page 48: ...hip set Intel 440LX chip set Data bus width 64 bits Address bus width 32 bits DMA channels seven Interrupt levels 15 Flash EPROM BIOS 2 Mb Expansion Bus Bus types PCI and ISA PCI bus complies with PCI Specification 2 1 Bus speeds PCI 33 MHz ISA 8 33 MHz PCI expansion card connectors Net PC computers one Low profile computers two one PCI connector and one ISA connector share an expansion card slot ...

Page 49: ...ors share expansion card slots with PCI connectors NIC NIC integrated on standard system board or optional on enhanced manageability system board 3Com PCI 3C905 network controller operating at 10 or 100 Mbps Memory Architecture 64 bit nonparity or 72 bit parity non interleaved DIMM sockets three gold contacts DIMM capacities 16 and 32 MB nonparity SDRAM 32 64 and 128 MB parity SDRAM Standard RAM 1...

Page 50: ...e bay for a 1 inch high EIDE hard disk drive Low profile computers one bay for a 1 inch high EIDE or SCSI hard disk drive Midsize computers two bays for either one or two 1 inch high EIDE or SCSI hard disk drives or one 1 inch high EIDE or SCSI hard disk drive and one 1 6 inch high EIDE or SCSI hard disk drive Mini tower computers two bays for either one or two 1 inch high EIDE or SCSI hard disk d...

Page 51: ...m stereo Audio microphone 89 mV rms maximum mono Audio line out 1 4 V rms maximum stereo at 32 ohms minimum impedance Internally accessible EIDE hard disk drive two 40 pin connectors on PCI local bus Diskette drive 34 pin connector CD ROM drive audio interface 4 pin connector Key Combinations Ctrl Alt Del restarts reboots the system Ctrl Alt Enter starts System Setup program during the POST only C...

Page 52: ...n LED Activity indicator on systems with NIC connector yellow LED Power Power supply wattage Net PC computers 80 W Low profile computers 145 W Midsize computers 200 W Mini tower computers 200 W Power supply heat dissipation Net PC computers 400 BTU nominal Low profile computers 808 BTU nominal Midsize computers 913 BTU nominal Mini tower computers 913 BTU nominal Power supply voltage 90 to 135 V a...

Page 53: ...h 41 9 cm 16 5 inches Depth 44 5 cm 17 5 inches Weight minimum 12 7 kg 28 0 lb Mini tower computers Height 44 4 cm 17 5 inches Width 20 6 cm 8 1 inches Depth 43 7 cm 17 2 inches Weight minimum 14 9 kg 33 0 lb Environmental Temperature Operating 10 to 35 C 50 to 95 F Storage 40 to 65 C 40 to 149 F Relative humidity 20 to 80 noncondensing The maximum operating temperature of 35 C 95 F is for altitud...

Page 54: ...ting in a vertical orien tation and bottom half sine pulse with a change in velocity of 20 inches sec 50 8 cm sec Storage 27 G faired square wave with a velocity change of 200 inches sec 508 cm sec Altitude Operating 16 to 3048 m 50 to 10 000 ft Storage 16 to 10 600 m 50 to 35 000 ft The maximum operating temperature of 35 C 95 F is for altitudes below 914 6 m 3000 ft Above 914 6 m 3000 ft the max...

Page 55: ... description can often indicate the cause of a problem or indicate the appropriate troubleshooting procedure to use After the user describes the problem follow these steps 1 Ask the user to back up any data on the hard disk drive if the system s condition permits See Maintaining the System in the online System User s Guide for infor mation about backing up data 2 Ask the user to try to duplicate t...

Page 56: ...of the serial port connectors and its captive screws must be secure enough to ensure a firm connection 4 Verify that any devices attached to the serial and parallel port connec tors are properly connected Each of the serial and parallel interface cables must be firmly attached to an appropriate connector on the back of the computer as well as to the interface connector on the device The captive sc...

Page 57: ... simultaneously It may be necessary to reboot the system several times in order to complete all of these steps To observe problem indications during the boot routine follow these steps 1 Insert the diagnostics diskette into drive A Turn on all peripherals and the computer If the computer is already on press the reset button or Ctrl Alt Del to reboot the system 2 Check the power supply fan Does the...

Page 58: ...er in this chapter No Proceed to step 6 6 Insert another copy of the diagnostics diskette into the diskette drive and reboot the system Does the Diagnostics Menu appear Yes See Running the System Diagnostics found later in this chapter No Proceed to the next section Internal Visual Inspection Internal Visual Inspection A simple visual inspection of a computer s interior hardware can often lead to ...

Page 59: ...apter 4 5 6 or 7 as appropriate for your system 4 Verify that all jumpers are set correctly For information about these jumpers see System Board Jumpers in Chapter 1 5 Check all cable connectors inside the computer to verify that they are firmly attached to their appropriate connectors 6 Reinstall the computer cover 7 Reconnect the computer and any attached peripherals to their power sources and t...

Page 60: ...ts that aid in troubleshooting major components of the computer To run the server based diagnostics follow these steps 1 Turn on all peripherals and the computer If the computer is already on press Ctrl Alt Del to reboot the computer 2 If necessary enter the System Setup program and set the computer to boot from the network Highlight the Boot Sequence field see Figure A 1 Either press Alt d to res...

Page 61: ... speaker by generating tones Video Tests Verify proper operation of the video controller and the video control circuitry USB1 Tests Check the USB interface registers and the USB controller Serial Port 1 Tests Check the computer s interface with external devices connected through serial port 1 Serial Port 2 Tests Check the computer s interface with external devices connected through serial port 2 P...

Page 62: ...ts from all test groups to quickly locate a failure or to indicate where further testing is needed to isolate a failure Run All Tests Runs all tests for a thorough test of the computer Run Specific Tests Tests a particular area or subsystem If the Diagnostics Menu does not appear check with the network adminis trator to determine if the service partition was removed from the hard disk drive If it ...

Page 63: ... based or optionally diskette based diagnostics using an external diskette drive kit connected to the computer as shown in Figure 2 1 and described in the following procedure The diskette based diagnostics contains the same tests as the server based and hard disk based diagnostics These tests aid in troubleshooting all major com ponents of the computer Connecting an External Diskette Drive to the ...

Page 64: ...screen followed by a message indicating that the diagnostics is loading Before the diagnostics loads a program tests the portion of main memory RAM required for loading the diagnostics If a main memory error is detected a message indicates which DIMM has failed If no errors are found in main memory the diagnostics loads and the Diagnostics Menu appears 3 Observe the monitor screen for the Diagnost...

Page 65: ...ver based hard disk based or diskette based diagnostics reveals the source of the problem or leads to the proper troubleshooting steps for determining the source of the problem call Dell for technical assistance For instructions see Contacting Dell in the online Network Administrator s Guide or online System User s Guide ...

Page 66: ...2 12 Dell OptiPlex GXa and OptiPlex NX Systems Service Manual ...

Page 67: ... use the computer diagnostics to run the appropri ate tests to help isolate the source of the problem See Running Computer Diagnostics in Chapter 2 POST Beep Codes If the monitor cannot display error messages during the POST the system may emit a series of beeps that identifies the problem or that can help you identify a faulty component or assembly Table 3 1 lists the beep codes that may be gener...

Page 68: ... 2 No memory installed No memory installed or faulty or improperly seated DIMM 1 3 3 1 3 4 1 4 1 1 4 2 2 1 1 through 2 4 4 Chip or data line failure in the first 64 KB of main memory Odd even logic failure in the first 64 KB of main memory Address line failure in the first 64 KB of main memory Parity failure in the first 64 KB of main memory Bit failure in the first 64 KB of main memory Faulty or ...

Page 69: ...test failure Search for video ROM failure Faulty video subsystem defective system board 4 2 1 4 2 2 4 2 3 4 2 4 No timer tick Shutdown failure Gate A20 failure Unexpected interrupt in protected mode Defective system board 4 3 1 Memory failure above address 0FFFFh Faulty or improperly seated DIMM 4 3 3 Timer chip counter 2 failure Defective system board 4 3 4 Time of day clock stopped Bad battery o...

Page 70: ...rd disk drive or associated controller defective Faulty diskette tape drive subsystem or hard disk drive subsystem defec tive system board Data error Computer received un recoverable data read error from diskette or hard disk drive Faulty diskette diskette drive or hard disk drive Decreasing available memory Read write failure during POST prevents system from using available memory One or more DIM...

Page 71: ...sk drive read failure Hard disk failure Hard disk drive failed to initialize Incorrect configuration settings in System Setup program improperly con nected hard disk drive cable faulty hard disk drive controller sub system defective system board or loose power cable Invalid con figuration information please run SETUP program System Setup program contains incorrect system configuration settings Inc...

Page 72: ...rd logic failure at address read value expect ing value Memory odd even logic failure at address read value expect ing value Memory write read failure at address read value expecting value During memory test value read at address was incorrect Faulty or improperly seated DIMMs or defec tive system board Memory alloca tion error Software in use con flicts with operating system application pro gram ...

Page 73: ... Faulty diskette diskette tape drive subsystem or hard disk drive sub system Not a boot diskette No operating system on diskette No operating system on diskette Plug and Play Configuration Error System encountered problem in trying to configure one or more expansion cards System resource conflict Read fault Requested sec tor not found MS DOS cannot read from diskette or hard disk drive System coul...

Page 74: ...e of day not set Time or date setting in System Setup program incorrect or system bat tery bad Incorrect Time or Date settings or defective sys tem battery Timer chip counter 2 failed Timer circuit on system board malfunctioning Defective system board Unexpected interrupt in protected mode Keyboard mouse con troller malfunctioning or one or more DIMMs improperly seated Improperly seated DIMMs or f...

Page 75: ... Parts on the Net PC Chassis as appropriate Unless otherwise noted each procedure assumes the following You have performed the steps in Precautionary Measures found later in this chapter You have removed the computer cover You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided Recommended Tools Most of the procedures in th...

Page 76: ...sources to reduce the potential for personal injury Also dis connect any telephone or telecommunication lines from the computer 3 Wait 5 seconds after powering down the computer before disconnecting a peripheral from the computer or removing a component from the computer s system board to avoid possible dam age to the system board 4 Wear a wrist grounding strap and clip it to an unpainted metal su...

Page 77: ...d identifies major components for orientation Refer to this illustration as needed when performing the component removal replacement procedures in this chapter Figure 4 1 Internal View of the Low Profile Computer back power supply drive cage for external drive system board internal hard disk drive expansion card cage CD ROM drive in external bay diskette drive ...

Page 78: ...led 3 Press in on the two securing buttons until the cover is free to swing up 4 Raise the back of the cover and pivot it toward the front of the computer 5 Lift the cover off of the hooks at the front of the chassis Three plastic hooks on the inside front part of the cover secure it to the chassis Before you reinstall the cover fold all cables out of the way so that they do not interfere with the...

Page 79: ...u 2 To remove the 3 5 inch diskette drive eject button pull gently on the plastic part of the button until it comes free 3 To remove the power button or the reset button use a small screw driver and push in on the two or three plastic clips that hold the button to the computer cover When these clips are released the button comes free from the front panel of the cover power button reset button ejec...

Page 80: ...ont of the cover facing you 2 From the front of the cover use your thumbs to push inward on the insert until it slides off the two posts To replace a 5 25 inch front panel insert position the two ring tabs over the posts on the inside of the bay opening and then press the ring tabs over the posts If necessary use a 1 4 inch nutdriver to help push on the ring tabs ring tabs 2 posts 2 computer cover...

Page 81: ...le from the PANEL connector on the system board see Figure 4 15 2 From the inside of the chassis remove the mounting screw holding the control panel to the chassis 3 Remove the control panel from the chassis When you reinstall the control panel be sure to put the right side of the control panel behind the mounting tab control panel cable control panel mounting screw mounting tab chassis ...

Page 82: ...fer to this figure when you perform any of the procedures in the following subsections Figure 4 6 Drive Hardware back power supply diskette tape drive interface cable DC power cable hard disk drive 3 5 inch diskette drive EIDE cable 5 25 inch drive bay and bracket DSKT connector primary EIDE interface connector IDE1 secondary EIDE interface connector IDE2 ...

Page 83: ...he two 3 5 inch diskette drive assembly latches to the left to release the assembly Rotate the left side of the assembly up and lift the assembly out of the chassis 3 Remove the two drive mounting screws from the left side of the drive and remove the drive from the bracket When you replace the 3 5 inch diskette drive be sure the mounting holes on the right side of the drive engage the two hooks on...

Page 84: ... of the chassis 4 Lay the 5 25 inch drive assembly upside down then remove the four screws attaching the drive to the bracket When you replace the 5 25 inch drive place the front of the drive toward the front of the bracket then install the four screws but do not tighten them Align the screws with the score marks on the bracket and tighten the screws in the order stamped on the bottom of the brack...

Page 85: ...ecures the hard disk drive bracket to the chassis 3 Pivot the hard disk drive assembly up and lift it out of the chassis 4 Remove the four hard disk drive mounting screws that attach the hard disk drive to the hard disk drive bracket When you reinstall the hard disk drive assembly be sure the tabs on the back of the mounting plate fully engage the notches on the chassis before you rotate the assem...

Page 86: ...n lift it from the chassis When you replace the system power supply place it down inside the chassis and against the right side of the chassis Then slide the system power supply toward the back of the chassis and hook the tabs into the right side of the power supply NOTE When replacing the power supply on an enhanced manageability system ensure that the replacement power supply is an EM power supp...

Page 87: ...ving any of the expansion cards leave the external cables attached to the expansion cards Expansion Card Cage Figure 4 11 Expansion Card Cage Removal To remove an expansion card cage follow these steps 1 Rotate the lever toward the back of the computer until it stops in the upright position 2 Lift the expansion card cage up and away from the computer To replace an expansion card cage keep it flush...

Page 88: ...les from the expansion card being removed 2 Remove the expansion card cage 3 Remove the retaining screw from the card mounting bracket 4 Grasp the expansion card by its corners and carefully remove it from the expansion card connector expansion card card slot opening card mounting bracket retaining screw expansion card connector riser board ...

Page 89: ...cards 2 Lay the expansion card cage on a flat work surface with the riser board facing up 3 Remove the two riser board mounting screws 4 Lift the riser board away from the expansion card cage When you replace the riser board be sure the alignment feature on the expansion card cage engages with the alignment slot riser board riser board mounting screws 2 expansion card cage riser board alignment sl...

Page 90: ...pgrade module if present the single edge contact SEC cartridge heat sink assembly and the guide bracket assembly from the old system board and install them on the replacement board Also set the jumpers on the new system board so they are identical to those on the old board unless a microprocessor upgrade is being installed If the original system board is an EM system board replace with an EM syste...

Page 91: ...oard jumpers battery socket BATTERY control panel connector PANEL 3 3 V power input connector POWER_2 main power input connector POWER_1 SEC cartridge SLOT1 DIMM sockets 3 DIMM_A DIMM_C front of computer CD ROM audio interface connector CD_IN video memory upgrade socket VIDEO_UPGRADE line in jack LINE IN line out jack LINE OUT microphone jack MIC optional NIC connector ENET video connector MONITOR...

Page 92: ...M Removal 5 Reinstall the replacement DIMM by pressing the DIMM fully into the socket while closing the securing clips to lock the DIMM into the socket Figure 4 17 DIMM Installation 6 Replace all assemblies and cables previously removed Video Memory You can upgrade video memory from 2 to 4 MB by installing a video memory upgrade module in the video memory upgrade socket on the system board Adding ...

Page 93: ...ter cover and reconnect the AC power cable to the AC outlet Press the power switch on the computer to reboot the system NOTE As the system boots it automatically detects the presence of the new video memory upgrade module and automatically changes the system con figuration information in the System Setup program 6 Enter the System Setup program and confirm that 4 MB is shown in the Video Memory ca...

Page 94: ... microprocessor upgrade kit is shipped with an SEC cartridge heat sink assembly which includes the microprocessor micro processor heat sink and L2 cache memory module You may also have to reseat or replace an SEC cartridge heat sink assembly during normal maintenance SEC Cartridge Heat Sink Assembly Figure 4 19 SEC Cartridge Heat Sink Removal SEC cartridge release latches 2 heat sink SEC cartridge...

Page 95: ...lease latches located directly on top of the SEC cartridge adjacent to the heat sink assembly until the latches click 6 Lift the SEC cartridge heat sink assembly out of its guide bracket assembly connector on the system board NOTE When installing the SEC cartridge heat sink assembly carefully orient the assembly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its conn...

Page 96: ...omputer cover reconnect all cabling and reboot the system 8 Enter the System Setup program and configure the system using the information from the printouts you made earlier 9 Turn off the computer wait 10 or more minutes and then reenter the System Setup program to ensure that the date and time are still correct indicating that the system battery is functioning correctly CAUTION If you pry out th...

Page 97: ...arts on the Net PC Chassis as appropriate Unless otherwise noted each procedure assumes the following You have performed the steps in Precautionary Measures found later in this chapter You have removed the computer cover You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided Recommended Tools Most of the procedures in this...

Page 98: ... sources to reduce the potential for personal injury Also disconnect any telephone or telecommunication lines from the computer 3 Wait 5 seconds after powering down the computer before disconnecting a peripheral from the computer or removing a compo nent from the computer s system board to avoid possible damage to the system board 4 Wear a wrist grounding strap and clip it to an unpainted metal su...

Page 99: ...ntation Refer to this illustration as needed when perform ing the component removal replacement procedures in this chapter Figure 5 1 Internal View of the Midsize Computer power supply diskette tape drive interface cable hard disk drive bracket hard disk drive interface cable 3 5 inch diskette drive expansion card cage expansion card slots 5 system board external drive bays ...

Page 100: ...t side of the computer on a flat work surface 2 Unscrew the floor stand screw Use your fingers or a wide flat blade screwdriver to unscrew the floor stand screw 3 Pull the floor stand away from the computer Disengage the three orientation nubs that position and help hold the floor stand to the computer floor stand screw ...

Page 101: ... two securing buttons until the cover is free to swing up 3 Raise the back of the cover and pivot it toward the front of the computer 4 Lift the cover off the hooks at the front of the chassis Four plastic hooks on the inside front part of the cover secure it to the chassis Before you reinstall the cover fold all cables out of the way so that they do not interfere with the cover or with proper air...

Page 102: ...ou 2 To remove the 3 5 inch diskette drive eject button pull gently on the plastic part of the button until it comes free 3 To remove the power button or the reset button use a small screw driver and push in on the two or three plastic clips that hold the button to the computer cover When these clips are released the button comes free from the front panel of the cover power button reset button com...

Page 103: ...t of the cover facing you 2 From the front of the cover use your thumbs to push inward on the insert until it slides off the two posts To replace a 5 25 inch front panel insert position the two ring tabs over the posts on the inside of the bay opening and then press the ring tabs over the posts If necessary use a 1 4 inch nutdriver to help push on the ring tabs ring tabs 2 posts 2 computer cover u...

Page 104: ...t the control panel cable from the PANEL connector on the system board see Figure 5 18 3 Remove the mounting screw holding the control panel to the chassis 4 Slide the control panel out of the hooks holding it to the chassis Note the routing of the control panel cable as you remove it from the chassis control panel control panel cable screw chassis hooks 2 ...

Page 105: ...puter Refer to this figure when you perform any of the procedures in the following subsections Figure 5 7 Drive Hardware diskette tape drive interface cable DC power cable DSKT connector system power supply hard disk drive bracket secondary EIDE interface connector IDE2 primary EIDE interface connector IDE1 EIDE cable 3 5 inch diskette drive ...

Page 106: ...ct the DC power cable and the interface cable from the back of the 3 5 inch diskette drive 2 Remove the bracket mounting screw 3 Rotate the left side of the 3 5 inch diskette drive assembly up and lift the assembly out of the chassis 4 Remove the two drive mounting screws from the left side of the drive and remove the drive from the bracket When you replace the 3 5 inch diskette drive be sure that...

Page 107: ...ide the drive assembly forward to remove it 3 Remove the four screws attaching the 5 25 inch drive to the mounting plate and lift the drive out of the mounting plate see Figure 5 10 Figure 5 10 5 25 Inch Drive Removal When you replace the 5 25 inch drive align the front of the drive flush with the tab at the front of the mounting plate Insert the four screws and tighten them in the order stamped o...

Page 108: ...s the hard disk drive bracket to the front of the chassis 3 Grasp the handle on the front of the bracket and rotate the front of the bracket up until the hooks are free from the chassis 4 Lift the hard disk drive bracket out of the computer When you reinstall the hard disk drive bracket place the lower back tab of the hard disk drive bracket into position be sure that the opening in the lower back...

Page 109: ... the hard disk drive bracket One hard disk drive attaches to the hard disk drive bracket at the sides of the drive The other hard disk drive attaches to the hard disk drive bracket at the bottom of the hard disk drive 3 Slide the drive out of the hard disk drive bracket hard disk drive drive mounting screws 4 for side mounted drive hard disk drive bracket drive mounting screws 4 for bottom mounted...

Page 110: ... Press the securing tab to the left to release the power supply 3 Disconnect the DC power cables from the system board and the drives 4 Lift the front end of the system power supply up and move it to the right to disengage the power supply from the slot in the chassis 5 Lift the system power supply from the computer NOTE When replacing the power supply on an enhanced manageability system ensure th...

Page 111: ... are not removing any expansion cards leave the external cables attached to them Expansion Card Cage Figure 5 14 Expansion Card Cage Removal To remove an expansion card cage follow these steps 1 Rotate the lever toward the back of the computer until it stops in the upright position 2 Lift the expansion card cage up and away from the computer To replace an expansion card cage keep the cage flush ag...

Page 112: ...from the expansion card being removed 2 Remove the expansion card cage 3 Remove the retaining screw from the card mounting bracket 4 Grasp the expansion card by its corners and carefully remove it from the expansion card connector expansion card card slot opening card mounting bracket retaining screw expansion card connector riser board ...

Page 113: ...age and all expansion cards 2 On a flat work surface turn the expansion card cage over with the riser board facing up 3 Remove the riser board mounting screws 4 Slide the riser board down until it stops then lift the riser board away from the expansion card cage riser board riser board mounting screws 2 expansion card cage slots 2 ...

Page 114: ...ade module if present the single edge contact SEC cartridge heat sink assembly and the guide bracket assembly from the old system board and install them on the replacement board Also set the jumpers on the new system board so they are identical to those on the old board unless a micro processor upgrade is being installed If the original system board is an EM system board type replace with an EM sy...

Page 115: ...rd jumpers battery socket BATTERY control panel connector PANEL 3 3 V power input connector POWER_2 main power input connector POWER_1 SEC cartridge SLOT1 DIMM sockets 3 DIMM_A DIMM_C front of computer CD ROM audio interface connector CD_IN video memory upgrade socket VIDEO_UPGRADE line in jack LINE IN microphone jack MIC optional NIC connector ENET video connector MONITOR microprocessor fan conne...

Page 116: ...al 5 Reinstall the replacement DIMM by pressing the DIMM fully into the socket while closing the securing clips to lock the DIMM into the socket Figure 5 20 DIMM Installation 6 Replace all assemblies and cables previously removed Video Memory You can upgrade video memory from 2 to 4 MB by installing a video memory upgrade module in the video memory upgrade socket on the system board Adding additio...

Page 117: ...r cover and reconnect the AC power cable to the AC outlet Press the power switch on the computer to reboot the system NOTE As the system boots it automatically detects the presence of the new video memory upgrade module and automatically changes the system con figuration information in the System Setup program 6 Enter the System Setup program and confirm that 4 MB is shown in the Video Memory cate...

Page 118: ...microprocessor upgrade kit is shipped with an SEC cartridge heat sink assembly which includes the microprocessor micro processor heat sink and L2 cache memory module You may also have to reseat or replace an SEC cartridge heat sink assembly during normal maintenance SEC Cartridge Heat Sink Assembly Figure 5 22 SEC Cartridge Heat Sink Removal SEC cartridge release latches 2 heat sink SEC cartridge ...

Page 119: ...ase latches located directly on top of the SEC cartridge adjacent to the heat sink assembly until the latches click 6 Lift the SEC cartridge heat sink assembly out of its guide bracket assembly connector on the system board NOTE When installing the SEC cartridge heat sink assembly carefully orient the assembly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its connec...

Page 120: ...omputer cover re connect all cabling and reboot the system 8 Enter the System Setup program and configure the system using the information from the printouts you made earlier 9 Turn off the computer wait 10 or more minutes and then reenter the System Setup program to ensure that the date and time are still correct indicating that the system battery is functioning correctly CAUTION If you pry out t...

Page 121: ... Parts on the Net PC Chassis as appropriate Unless otherwise noted each procedure assumes the following You have performed the steps in Precautionary Measures found later in this chapter You have removed the computer cover You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided Recommended Tools Most of the procedures in th...

Page 122: ...sources to reduce the potential for personal injury Also dis connect any telephone or telecommunication lines from the computer 3 Wait 5 seconds after powering down the computer before disconnecting a peripheral from the computer or removing a compo nent from the computer s system board to avoid possible damage to the system board 4 Wear a wrist grounding strap and clip it to an unpainted metal su...

Page 123: ... mini tower computer and identifies major components for orientation Refer to this illustration as needed when performing the component removal replacement procedures in this chapter Figure 6 1 Internal View of the Mini Tower Computer power supply system board expansion card cage riser board hard disk drive bracket external drive bays ...

Page 124: ... padlock if one is installed 3 Facing the left side of the computer press the release button at the bottom left corner of the front bezel 4 Lift the bottom of the cover allowing it to pivot up toward you 5 Disengage the tabs that secure the cover to the top of the chassis and lift the cover away Before you reinstall the cover fold all cables out of the way so that they do not interfere with the co...

Page 125: ...Front Bezel Figure 6 3 Front Bezel Removal 1 Press the tab release marked with the icon 2 Tilt the bezel away from the chassis 3 Disengage the two retaining hooks at the bottom of the bezel and pull the bezel away from the chassis tab release retaining hooks 2 ...

Page 126: ...bezel facing up 2 To remove the 3 5 inch diskette drive eject button pull gently on the plastic part of the button until it comes free 3 To remove the power button or the reset button use a small screw driver and push in on the two or three plastic clips that hold the button to the bezel When these clips are released the button comes free from the bezel power button reset button front bezel eject ...

Page 127: ... steps 1 Hold the bezel with the front facing you 2 From the front of the bezel use your thumbs to press inward on the insert until it slides off the two posts To replace a 5 25 inch front panel insert position the two ring tabs over the posts on the inside of the bay opening and then press the ring tabs over the posts posts 2 front bezel ring tabs 2 5 25 inch front panel insert ...

Page 128: ...these steps 1 Hold the bezel with the front facing you 2 Inside the bezel press the eject button mechanism toward the front panel to snap the plastic insert out of its opening To replace the 3 5 inch front panel insert work from outside the bezel Place the insert in position and press it into the opening front of bezel back of bezel eject button mechanism ...

Page 129: ... the control panel cable from the PANEL connector on the system board see Figure 6 20 3 Remove the mounting screw holding the control panel to the chassis 4 Slide the control panel out of the hooks holding it to the chassis Note the routing of the control panel cable as you remove it from the chassis control panel control panel cable screw chassis hooks 2 ...

Page 130: ...the following subsections Figure 6 8 Drive Hardware Externally Accessible Drive Assemblies The following subsections contain removal replacement procedures for drives installed in the externally accessible drive bays diskette tape drive interface cable DC power cable DSKT connector hard disk drive bracket primary EIDE interface connector IDE1 secondary EIDE interface connector IDE2 EIDE cable 3 5 ...

Page 131: ...e Assembly Figure 6 9 3 5 Inch Diskette Drive Assembly Removal 1 Disconnect the DC power cable and the interface cable from the back of the 3 5 inch diskette drive 2 Press the retaining tab release button and pull the drive assembly for ward to remove it retaining tab release button ...

Page 132: ...e of the drive and remove the drive from the bracket see Figure 6 10 Figure 6 10 3 5 Inch Diskette Drive Bracket When you replace the 3 5 inch diskette drive be sure that the two hooks on the right side of the bracket engage the mounting holes in the side of the 3 5 inch diskette drive hooks 2 drive mounting screw ...

Page 133: ...bly Removal To remove a 5 25 inch drive assembly from the middle or lower drive bay fol low these steps 1 Disconnect the DC power cable and the interface cable from the back of the drive 2 Press in on the two retaining tabs one on each side of the drive and slide the drive assembly forward to remove it retaining tabs 2 ...

Page 134: ... Figure 6 12 Figure 6 12 5 25 Inch Drive Removal When you replace the 5 25 inch drive align the front of the drive flush with the tab at the front of the mounting plate Insert the four screws and tighten them in the order stamped on the bottom of the 5 25 inch drive mounting plate screws 4 align the front of the drive flush with the tab at the front of the 5 25 inch drive mounting plate ...

Page 135: ...e bracket to the drive cage in the chassis 3 Grasp the bracket and rotate it outward from the chassis until the slid ing tab clears the slide rail on the drive cage 4 Lift the hard disk drive bracket up slightly to free the hinge tabs and remove it from the computer When you reinstall the hard disk drive bracket insert the bracket s hinge tabs into the chassis slot so that the tabs hook over the s...

Page 136: ...e hard disk drive bracket One hard disk drive attaches to the hard disk drive bracket at the sides of the drive The other hard disk drive attaches to the hard disk drive bracket at the bottom of the hard disk drive 3 Slide the drive out of the hard disk drive bracket hard disk drive hard disk drive bracket drive mounting screws 4 for bottom mounted drive sliding tab drive mounting screws 4 for sid...

Page 137: ...es from the system board and the drives 4 Facing the left side of the computer move the front end of the system power supply toward you and lift it up to disengage the power supply from the slot in the chassis 5 Lift the system power supply from the computer When you reinstall the power supply place the power supply detent link over the pin on the power supply as you position the power supply in t...

Page 138: ...ansion cards leave the external cables attached to them Expansion Card Cage Figure 6 16 Expansion Card Cage Removal 1 Rotate the lever toward the back of the computer until it stops in the upright position 2 Slide the expansion card cage out of the computer To replace an expansion card cage align the tabs on the left and right sides of the expansion card cage with the slots on the back and bottom ...

Page 139: ...rom the expansion card being removed 2 Remove the expansion card cage 3 Remove the retaining screw from the card mounting bracket 4 Grasp the expansion card by its corners and carefully remove it from the expansion card connector expansion card card slot opening card mounting bracket retaining screw expansion card connector riser board ...

Page 140: ...all expansion cards 2 Place the expansion card cage on a flat work surface with the riser board facing up 3 Remove the riser board mounting screws 4 Slide the riser board away from the release handle until it stops then lift the riser board away from the expansion card cage riser board riser board mounting screws 2 expansion card cage slots 2 ...

Page 141: ...de module if present the single edge contact SEC cartridge heat sink assembly and the guide bracket assembly from the old system board and install them on the replacement board Also set the jumpers on the new system board so they are identical to those on the old board unless a micro processor upgrade is being installed If the original system board is an EM system board type replace with an EM sys...

Page 142: ...oard jumpers battery socket BATTERY control panel connector PANEL 3 3 V power input connector POWER_2 main power input connector POWER_1 SEC cartridge SLOT1 DIMM sockets 3 DIMM_A DIMM_C front of computer CD ROM audio interface connector CD_IN video memory upgrade socket VIDEO_UPGRADE line in jack LINE IN line out jack LINE OUT microphone jack MIC optional NIC connector ENET video connector MONITOR...

Page 143: ... Removal 5 Reinstall the replacement DIMM by pressing the DIMM fully into the socket while closing the securing clips to lock the DIMM into the socket Figure 6 22 DIMM Installation 6 Replace all assemblies and cables previously removed Video Memory You can upgrade video memory from 2 to 4 MB by installing a video memory upgrade module in the video memory upgrade socket on the system board Adding a...

Page 144: ...ter cover and reconnect the AC power cable to the AC outlet Press the power switch on the computer to reboot the system NOTE As the system boots it automatically detects the presence of the new video memory upgrade module and automatically changes the system con figuration information in the System Setup program 6 Enter the System Setup program and confirm that 4 MB is shown in the Video Memory ca...

Page 145: ...icroprocessor upgrade kit is shipped with an SEC cartridge heat sink assembly which includes the microprocessor micro processor heat sink and L2 cache memory module You may also have to reseat or replace an SEC cartridge heat sink assembly during normal maintenance SEC Cartridge Heat Sink Assembly Figure 6 24 SEC Cartridge Heat Sink Removal SEC cartridge release latches 2 heat sink SEC cartridge g...

Page 146: ...elease latches located directly on top of the SEC cartridge adjacent to the heat sink assembly until the latches click 6 Lift the SEC cartridge heat sink assembly out of its guide bracket assembly connector on the system board NOTE When installing the SEC cartridge heat sink assembly carefully orient the assembly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its con...

Page 147: ...lace the computer cover re connect all cabling and reboot the system 8 Enter the System Setup program and configure the system using the information from the printouts you made earlier 9 Turn off the computer wait 10 or more minutes and reenter the System Setup program to ensure that the date and time are still correct indicat ing that the system battery is functioning correctly CAUTION If you pry...

Page 148: ...6 28 Dell OptiPlex GXa and OptiPlex NX Systems Service Manual ...

Page 149: ...e Mini Tower Chassis as appropriate Unless otherwise noted each procedure assumes the following You have performed the steps in Precautionary Measures found later in this chapter You have removed the computer cover You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided Recommended Tools Most of the procedures in this chapt...

Page 150: ... sources to reduce the potential for personal injury Also dis connect any telephone or telecommunication lines from the computer 3 Wait 5 seconds after powering down the computer before disconnecting a peripheral from the computer or removing a compo nent from the computer s system board to avoid possible damage to the system board 4 Wear a wrist grounding strap and clip it to an unpainted metal s...

Page 151: ... the stand away from the computer Disengage the locator pins that position and help secure the stand to the computer When reinstalling the stand align the front edge of the stand with the groove between the front bezel and the computer cover Move the stand until the loca tor pins engage the holes in the side of the computer The locator pins are keyed for correct installation Computer Cover Figure ...

Page 152: ...ntil the cover is free to swing up see Figure 7 2 4 Raise the back of the cover and pivot it toward the front of the computer 5 Lift the cover off the hooks at the front of the chassis Four plastic hooks at the front of the cover secure it to the chassis Before you reinstall the cover fold all cables out of the way so that they do not interfere with the cover or with proper airflow inside the comp...

Page 153: ...m board see Figure 7 7 3 From inside the chassis remove the mounting screw securing the con trol panel to the chassis 4 Remove the control panel from the chassis When you reinstall the control panel place the control panel between the tabs in the chassis Before reinstalling the power supply be sure to route the control panel cable under the retention tabs on the chassis wall control panel cable ca...

Page 154: ... from the back of the drive 2 Disconnect any external cables from the expansion card if one is installed 3 Remove the expansion card cage 4 Remove the expansion card if one is installed 5 Remove the four hard disk drive mounting screws that attach the hard disk drive to the expansion card cage hard disk drive mounting screws 4 hard disk drive expansion card cage ...

Page 155: ... back of the chassis and lift the connector away from the chassis 6 Rotate the top of the system power supply back until it clears the reten tion tab then lift the power supply from the chassis When you reinstall the system power supply place it in front of the two tabs on the bottom of the chassis Then rotate the power supply toward the front of the chassis until the retention tab snaps into plac...

Page 156: ...interface connector IDE1 diskette tape drive interface connector DSKT riser board connector RISER secondary EIDE interface connector IDE2 system board jumpers battery socket BATTERY control panel connector PANEL 3 3 V power input connector POWER_2 main power input connector POWER_1 SEC cartridge SLOT1 DIMM sockets 3 DIMM_A DIMM_C front of computer CD ROM audio interface connector CD_IN video memor...

Page 157: ...otate the securing lever toward the back of the computer until it stops in the upright position 4 Lift the expansion card cage up and away from the computer To replace an expansion card cage keep it flush against the left side of the chas sis to ensure that the two cage slots engage the tabs on the left side of the computer Press gently downward on the back right corner of the expansion card cage ...

Page 158: ...cage 2 Remove the retaining screw from the card mounting bracket 3 Grasp the expansion card by its corners and carefully remove it from the expansion card connector 4 Disconnect any network or other I O cables from the expansion card retaining screw card slot opening expansion card connector riser board expansion card card mounting bracket ...

Page 159: ...3 Lay the expansion card cage on a flat work surface with the riser board facing up 4 Remove the riser board mounting screw 5 Slide the riser board to the side as shown in Figure 7 10 and then remove the riser board from the expansion card cage When you replace the riser board be sure the two tabs on the expansion card cage engage the riser board slots riser board riser board mounting screw expans...

Page 160: ...cement DIMM by pressing the DIMM fully into the socket while closing the securing clips to lock the DIMM into the socket Figure 7 12 DIMM Installation 5 Replace all assemblies and cables previously removed Video Memory You can upgrade video memory from 2 to 4 MB by installing a video memory upgrade module in the video memory upgrade socket on the system board Adding additional video memory increas...

Page 161: ... cover and reconnect the AC power cable to the AC outlet Press the power switch on the computer to reboot the system NOTE As the system boots it automatically detects the presence of the new video memory upgrade module and automatically changes the system con figuration information in the System Setup program 6 Enter the System Setup program and confirm that 4 MB is shown in the Video Memory categ...

Page 162: ...sink and L2 cache memory module You may also have to reseat or replace an SEC cartridge heat sink assembly during normal maintenance SEC Cartridge Heat Sink Assembly Figure 7 14 SEC Cartridge Heat Sink Removal To remove the SEC cartridge heat sink assembly follow these steps 1 Remove the system power supply WARNING The SEC cartridge heat sink assembly can get extremely hot during system operations...

Page 163: ...ctly on top of the SEC cartridge adjacent to the heat sink assembly until the latches click 6 Lift the SEC cartridge heat sink assembly out of its guide bracket assembly connector on the system board NOTE When installing the SEC cartridge heat sink assembly carefully orient the assembly and press firmly with up to 25 pounds of force to mate the SEC cartridge with its connector Then slide the SEC c...

Page 164: ...m the old system board and install them on the replacement board Also if the original system board has a NIC connector ensure that the replace ment system board is equipped with a NIC connector When you reinstall the system board before you slide the system board back to lock it in position push down near each slot to engage the grounding clip onto its corresponding tab Push evenly on both sides o...

Page 165: ...ts you made earlier 9 Turn off the computer wait 10 or more minutes and then reenter the System Setup program to ensure that the date and time are still correct indicating that the system battery is functioning correctly CAUTION If you pry out the battery with a blunt object be careful not to touch the system board with the object Ensure that the object is inserted between the battery and the sock...

Page 166: ...7 18 Dell OptiPlex GXa and OptiPlex NX Systems Service Manual ...

Page 167: ...ion stored in NVRAM on the system board To enter the System Setup program follow these steps 1 Turn on or reboot the system 2 Press Ctrl Alt Enter immediately when prompted If you wait too long and the operating system begins to load into memory let the system complete the load operation then shut down the system and try again NOTE To ensure an orderly system shutdown consult the documentation tha...

Page 168: ...or use the left or right arrow key Changes take effect immediately BIOS Version XXX This category sets whether keyboard related error messages are reported at system startup Alt P next Tab Shift Tab change fields system data Time 13 17 02 Alt P next Alt B reboot help key functions Reserved Memory CPU Speed Num Lock None 233 MHz On Keyboard Errors System Password Password Status Boot Sequence Setup...

Page 169: ... for automatic If none of the supported drive types matches the parameters of the new drive enter parame ters directly To do so highlight the appropriate Drive category Drive 0 or Drive 1 and type u to display User1 Press Tab to highlight each of the parameter fields in succession and enter the appropriate number for each field NOTES For EIDE devices such as EIDE CD ROM drives and EIDE tape drives...

Page 170: ...d DPMS monitors and most EIDE drives automatically switch into low power mode during periods of system inactivity CAUTION Before enabling this feature check the monitor documentation to make sure the system has a DPMS compliant monitor Otherwise there is a risk of dam aging the monitor NOTE Not all EIDE hard disk drives support this feature Enabling this feature for a drive that does not support i...

Page 171: ...ional port IDE Hard Disk Enables system s built in EIDE hard disk drive interface Diskette Enables system s built in diskette drive controller Speaker Enables on board speaker Microprocessor Displays type of microprocessor installed Level 2 Cache Displays size of level 2 cache memory installed System Memory Displays entire amount of installed memory detected in system except for memory on EMS expa...

Page 172: ...A 6 Dell OptiPlex GXa and OptiPlex NX Systems Service Manual ...

Page 173: ...r 6 26 Net PC computer 7 16 beep codes 3 1 BIOS flash ROM 1 4 block diagram low profile computer 1 28 midsize computer 1 30 mini tower computer 1 31 Net PC computer 1 35 boot routine observing while troubleshooting 2 3 bracket hard disk drive removal midsize computer 5 12 mini tower computer 6 15 C cabling verification 2 2 CD ROM drive removal low profile computer 4 10 midsize computer 5 11 mini t...

Page 174: ...ard disk drive access indicator 1 8 NIC activity indicator 1 6 NIC link integrity indicator 1 6 power button 1 8 power indicator 1 8 reset button 1 7 cover removal low profile computer 4 4 midsize computer 5 5 mini tower computer 6 4 Net PC computer 7 3 D DC power cables low profile computer 1 27 cables midsize and mini tower comput ers 1 29 cables Net PC computer 1 35 connector pin assignments 1 ...

Page 175: ...mini tower computer 6 10 tape drive removal low profile computer 4 10 tape drive removal midsize computer 5 11 tape drive removal mini tower computer 6 13 E EIDE subsystem 1 4 eject button removal low profile computer 4 5 midsize computer 5 6 mini tower computer 6 6 enhanced manageability riser board for low profile computer 1 13 riser board for midsize computer 1 14 riser board for mini tower com...

Page 176: ...l mini tower computer 6 16 removal Net PC computer 7 6 service information 1 22 SMART technology 1 4 hard disk drive assembly removal Net PC computer 7 6 help getting 2 11 I I O ports 1 6 indicators See controls and indicators internal view low profile computer 1 9 midsize computer 1 9 mini tower computer 1 10 Net PC computer 1 11 internal visual inspection 2 4 interrupt assignments list of 1 20 I...

Page 177: ...tower computer 1 10 Net PC computer 1 11 POST beep codes description 3 1 list of 3 2 power button removal low profile computer 4 5 midsize computer 5 6 mini tower computer 6 6 power distribution low profile computer 1 28 midsize computer 1 30 mini tower computer 1 31 Net PC computer 1 35 power supply about 1 7 1 23 1 32 cables low profile computer 1 27 cables midsize and mini tower computers 1 30 ...

Page 178: ...7 2 6 service related information 1 17 1 23 1 24 SMART technology 1 4 specifications technical 1 36 stand for vertical orientation removal Net PC computer 7 2 subsystems audio 1 5 expansion 1 11 memory 1 16 NIC 1 5 SVGA 1 5 switch AC voltage selection 1 7 low profile computer 1 9 system battery removal low profile computer 4 21 midsize computer 5 23 mini tower computer 6 26 Net PC computer 7 16 sy...

Page 179: ...1 troubleshooting boot routine 2 3 diagnostics 2 6 external visual inspection 2 2 initial procedures 2 1 internal visual inspection 2 4 resource conflicts 2 6 service related information 1 17 1 22 using beep codes 3 1 U universal power supply 115 230 VAC 1 7 upgrade options 1 16 V video memory adding to low profile computer 4 18 adding to midsize computer 5 20 adding to mini tower computer 6 23 ad...

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Page 181: ... www dell com Printed in the U S A P N 51555 Rev A01 ...

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