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Dell Latitude LM Service Manual Download Page 62

Removing and Replacing Parts

4-25

LCD Panel

There are two types of LCD panels:  the dual-scan color display (STN) and the 
active-matrix color display (TFT). The removal process for both LCD panels is the 
same.

.

Figure 4-20.  LCD Panel Removal

To remove an LCD panel, follow these steps:

1. Remove the front bezel.

See the previous subsection, “Front Bezel.”

2. Remove LCD panel screws H11, H12, H13, and H14.

3. Remove the LCD Panel.

NOTE:  Be careful when removing any part of the LCD flex cable.

Lift up the LCD panel, and disconnect the LCD flex-cable connector. Dis-
connect the LCD panel cable from the upper inverter-board connector. 
Disconnect the LCD flex cable from the lower inverter-board connector.

LCD panel

(screws H15 and 
H16 are 3 mm)

 H11

 H12

 H13

 H14

(screws H11–H14 
are 6 mm)

LCD flex cable

power/ 
suspend 
indicator

6 mm

3 mm

inverter board

microphone

lower 
connector

upper 
connector

H15

H16

Summary of Contents for Latitude LM

Page 1: ...Thank you for purchasing this Factory Service Manual CD DVD from servicemanuals4u com Please check out our eBay auctions for more great deals on Factory Service Manuals servicemanuals4u ...

Page 2: ... HOO DWLWXGH 0 6 59 0 18 ...

Page 3: ... Latitude are registered trademarks of Dell Computer Corporation MS DOS is a registered trademark of Microsoft Corporation Inteland Pentium are registered trademarks of Intel Corporation IBM is aregistered trademark of International Business MachinesCorporation Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their produc...

Page 4: ...4 PC Card Indicator 1 4 AC Power Indicator 1 4 Battery Activity Indicator 1 4 Battery Status Indicator 1 4 Battery Charge Gauge 1 5 Password 1 5 System Power 1 6 Power Conservation 1 6 Interrupt Assignments 1 7 Technical Specifications 1 8 Chapter 2 Initial Procedures 2 1 Initial User Contact 2 1 Visual Inspection 2 1 Observing the Boot Routine 2 3 Eliminating Resource Conflicts 2 5 Getting Help 2...

Page 5: ...ts and Assemblies 4 7 Factory Repair Parts and Assemblies 4 11 Deleting the Password 4 18 Hard Disk Drive 4 19 Diskette Drive 4 20 CD ROM 4 21 Memory Module 4 22 LCD Assembly 4 23 Front Bezel 4 24 LCD Panel 4 25 Inverter Board 4 26 Microphone 4 26 LCD Assembly Latches 4 27 Power Suspend Indicator 4 28 Back Bezel 4 29 Keyboard 4 30 Top Assembly 4 32 Speakers 4 34 Status Display Board 4 35 I R Devic...

Page 6: ...4 7 Figure 4 10 Exploded View LCD Assembly 4 8 Figure 4 11 Exploded View Top Assembly 4 9 Figure 4 12 Exploded View Bottom Assembly 4 10 Figure 4 13 Capacitor C146 Location 4 18 Figure 4 14 Hard Disk Drive Disassembly 4 19 Figure 4 15 Diskette Drive Assembly 4 20 Figure 4 16 CD ROM Assembly 4 21 Figure 4 17 Memory Module Removal 4 22 Figure 4 18 LCD Assembly Removal 4 23 Figure 4 19 Front Bezel Re...

Page 7: ...0 Figure 4 34 Power Supply Board Removal 4 41 Figure 4 35 Audio Board Removal 4 42 Figure 4 36 Main Board Removal 4 43 Figure 4 37 Cache Board Removal 4 45 Tables Table 1 1 Interrupt Assignments 1 7 Table 1 2 Technical Specifications 1 8 Table 3 1 POST Beep Codes 3 2 Table 3 2 System Error Messages 3 3 Table 4 1 Factory Repair Parts and Assemblies 4 11 Table 4 2 Naming Conventions 4 17 ...

Page 8: ...ix ...

Page 9: ...training inIBM compatible PC troubleshooting techniques In addition to information provided in this manual Dell provides the Reference and Troubleshooting Guide for trouble shooting procedures and instructions on using the Dell diagnostics to test portable computers and the online System User s Guide for information about system setup and operations WARNING A WARNING indicates the potential for bo...

Page 10: ...xi ...

Page 11: ...xii ...

Page 12: ...s the following new and or advanced features 8 MB of nonremovable main memory on the main board The memory capacity can be increased up to 40 MB by installing a matched pair of 4 8 or 16 MB memory modules in the memory upgrade sockets on the main board An 11 3 inch dual scan SVGA color display or a 12 1 inch active matrix SVGA display 42 WH lithium ion battery nine cells 256 KB SRAM level 2 extern...

Page 13: ...on Figure 1 1 Front View of the Portable Computer Figure 1 2 Back View of the Portable Computer LCD assembly keyboard options bay touch pad latch 2 power button hard disk drive bay main battery compartment microphone status display panel power suspend indicator touch pad button 2 display close button PS 2 connector PC Card slots parallel port connector serial port connector I O panel service tag n...

Page 14: ...Press CAPS LOCK again to deactivate the feature Num Lock Indicator Press NUM LOCK to activate this feature Press NUM LOCK again to deactivate this feature Pad Lock Indicator This indicator appears when the embedded keypad is active To activate the embedded numeric keypad press FN NUM LOCK Press NUM LOCK to toggle between the cursor keys and number keys Scroll Lock Indicator Press SCROLL LOCK to ac...

Page 15: ...but the battery is not charging If the icon is blinking the computer is on and the battery is charging Battery Activity Indicator This indicator appears when there are batteries in the computer If the main battery is present the upper triangle appears If the secondary battery is present the lower triangle appears If either triangle is blink ing the battery is in use or charging Battery Status Indi...

Page 16: ...er indicator with the battery status in dicator means the battery is defective An indicator with one bar on the left means a battery is too hot Allow the battery to cool to room temperature The AC power indicator with the battery status in dicator and one bar means that the battery is too hot 40 C 104 F or more to start charging Charg ing starts automatically when the battery cools to below 40 C A...

Page 17: ...his feature press FN ESC or set the SUSPEND TIME OUT optionin the Power Menu of the Setup program When sus pend mode is activated the computer beeps once and the suspend mode indicator in the status display panel blinks every 4 seconds To deactivate this feature press any key on the built in keyboard NOTE To conserve power when the computer is not in use close the dis play If the display is closed...

Page 18: ...IRQ6 Generated by the diskette drive controller to indicate that the diskette drive requires the attention of the microprocessor IRQ7 Used by the parallel port IRQ8 Generated by the system RTC IRQ9 Software redirect to INTOA IRQ10 Reserved IRQ11 Reserved IRQ12 Generated by the keyboard controller to indicate that the out put buffer of the integrated touch pad or external PS 2 mouse is full IRQ13 U...

Page 19: ...ssor Chip Set and Bus System chip set Intel 430MX PCIset Data bus width 64 bits DRAM bus width 64 bits Address bus width 32 bits Flash EPROM 2 Mbits PC Card PC Card connectors two for two type I or type II cards or one type III card Cards supported 3 3 and 5 V PC Card connector size 68 pins Data width maximum 32 bits Memory Architecture fast page mode two way interleaved Memory module capacities 4...

Page 20: ... one IrDA 1 0 compliant window Audio microphone headphones speaker Audio Audio type SoundBlasterPro compatible voice and music functions Audio controller ESS 1688 Conversion 16 bit stereo analog to digital and digital to analog FM music synthesizer 20 voice 72 operator Interfaces Internal ISA bus External microphone minijack headphones speaker minijack Internal speaker amplifier 0 5 W stereo Contr...

Page 21: ... pixels 256 colors Refresh rate typical 70 Hz Response time typical 60 ms Operating angle 0 closed to 135 Dot pitch 0 31 mm Power consumption 2 35 W Controls brightness can be controlled through key combinations Dual Scan Display Type dual scan color STN Dimensions Height 172 8 mm 6 8 inches Width 230 4 mm 9 1 inches Diagonal 287 0 mm 11 3 inches Maximum resolution 800 x 600 pixels 256 colors Refr...

Page 22: ...h Key spacing 19 1 mm 0 75 inch Layout QWERTY AZERTY Kanji Touch Pad Interface PS 2 compatible X Y position resolutions 20 points mm 500 points inch Size Thickness 4 65 mm 0 18 inch at highest component Width 62 1 mm 2 4 inch sensor active area Height 49 0 mm 1 9 inch rectangle with 0 5 mm 0 02 inch tabs Weight 15 g 0 52 ounce 0 5 g 0 001 ounce Power Supply voltage 5 V 10 Supply current 4 mA maxim...

Page 23: ...ng time approximate with no power management features enabled 1 3 to 5 hours with one battery 6 to 10 hours with two batteries Life span approximate 1 500 discharge charge cycles Temperature range Charge 0 to 40 C 32 to 104 F Discharge 0 to 60 C 32 to 140 F Storage 20 to 50 C 4 to 122 F 1 Battery performance features such as charge time operating time and life span can vary according to the condit...

Page 24: ...dth 60 0 mm 2 36 inches Depth 107 5 mm 4 23 inches Weight with cables 0 3 kg 0 66 lb Temperature range Operating 5 to 35 C 41 to 95 F Storage 20 to 50 C 4 to 122 F Physical Computer Height 49 5 mm 1 95 inches Width 299 9 mm 11 8 inches Depth 228 7 mm 8 93 inches Weight with hard disk drive diskette drive battery and two PC Card blanks Dell Latitude LM P100SD 3 1 kg 6 9 lb Dell Latitude LM P133ST 3...

Page 25: ...tes air shipment Storage 1 1 GRMS using a random vibration spectrum that simulates truck shipment Maximum shock 2 Operating 1 52 m sec 4 98 ft sec less than or equal to a pulse width of 2 ms Storage 2 03 m sec 6 66 ft sec less than or equal to a pulse width of 2 ms Altitude Operating 0 m to 2438 m 0 ft to 8 000 ft Storage 0 m to 12 192 m 0 ft to 40 000 ft 2 Measured with the hard disk drive in hea...

Page 26: ... s condition permits See the Maintaining Your Computer section of the online System s User s Guide 2 Ask the user to try to duplicate the problem by repeating the operations he or she was performing at the time the problem occurred Can the user duplicate the problem Yes Proceed to step 3 No Proceed to the next section Visual Inspection 3 Observe the user to determine whether he or she is making an...

Page 27: ...battery power remove any installed batteries verify that they are free of any obvious physical damage and then reinsert the batteries into their respective compartments Press the test button located on each battery to see if there is a charge 6 Remove the diskette drive if installed verify that it is free of any obvi ous physical damage and then reinsert the drive into its compartment 7 Remove any...

Page 28: ...crews that secure the connectors at each end of the inter face cable are secure enough to ensure a firm connection c The attached device and its interface cable are free of any obvious phys ical damage 15 Turn on any attached peripherals and then the computer Does the problem recur Yes Proceed to the next section Observing the Boot Routine No No further steps are necessary Observing the Boot Routi...

Page 29: ... diskette drive or hard disk drive subsystem as appropriate System error messages Thesemessagescanindicateproblemsorprovidestatusinformation Ifasystem error message is displayed refer to Table 3 2 Beep codes Abeepcodeisaseriesofbeepsthatindicatesanerrorcondition Ifthecomputer emits a beep code refer to Table 3 1 NOTE The computer beeps once shortly after the system boots This beep is normal and no...

Page 30: ... devices If you suspect that resource conflicts might exist check the computer and reas sign the resources as necessary For more information about resolving conflicts see Chapter 3 Troubleshooting Your Computer in the Reference and Trouble shooting Guide Getting Help If none of the procedures in this chapter reveal the source of the problem or lead to the proper troubleshooting steps for determini...

Page 31: ...2 6 Dell Latitude LM Systems Service Manual ...

Page 32: ... display system error messages to indicate a failure you should load the diagnostics and run the appropriate tests to help isolate the source of the problem See Running the Dell Diagnos tics found later in this chapter POST Beep Codes If the display cannot display error messages during POST the computer may emit a series of beeps that identify the problem or that can help you identify a faulty com...

Page 33: ...ard 1 3 1 3 Keyboard controller test fail ure Faulty keyboard or faulty main board 1 3 4 1 RAM failure on address line nnnn Faulty memory module or faulty main board 1 3 4 3 RAM failure on data bits nnnn of high byte on memory bus Faulty memory module or faulty main board 1 4 1 1 RAM failure on data bits nnnn of low byte on memory bus Faulty memory module or faulty main board 2 1 2 3 Check ROM cop...

Page 34: ...memory mod ule Faulty main board Failing bits nnnn Memory failed at RAM address nnnn Faulty or improperly seated memory mod ule Faulty main board Fixed disk 0 failure Hard disk drive not responding to commands from com puter Corrupted hard disk drive boot sector or configuration file Faulty hard disk drive Faulty main board Fixed disk con troller failure Hard disk drive or con troller not respondi...

Page 35: ...con nections Faulty drive Faulty main board Parity check 1 nnnn Parity error in system bus at address nnnn Faulty main board Parity check 2 nnnn Parity error in I O bus at address nnnn Faulty main board Real time clock error CMOS battery that supports data stored in NVRAM may be dead Faulty battery Faulty main board Shadow RAM failed at off set nnnn Shadow RAM failed at address nnnn Faulty or impr...

Page 36: ... has been updated System RAM failed at off set nnnn Memory not operating correctly System RAM failed at address nnnn in the 64 KB block at which error was detected Faulty or improperly seated memory mod ule Faulty main board System timer error Timer circuit on main board malfunctioning Faulty main board Table 3 2 System Error Messages Continued Message Definition Probable Causes ...

Page 37: ...o start the diagnostics turn off the computer insert a diagnostics diskette into the diskette drive and then turn on the computer Starting the diagnostics causes the Dell logo screen to appear 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 det...

Page 38: ...ing the procedures in this chapter that require the display assem bly to be open use a book or something similar to support the display assembly The angle of the display assembly with respect to the bottom case should not exceed 135 degrees Also assume that locations or directions relative to the computer are as shown in Figure 4 1 unless otherwise specified in a procedure Figure 4 1 Computer Orie...

Page 39: ...tion about screw lengths is provided in illustrations Before installing a screw match the screw to the screw length graphics provided to check for correct length CAUTION It is essential that the correct length screw be used when reinstalling a screw Otherwise hardware damage could result Make sure that the screw is properly aligned with its corresponding hole and avoid overtightening B7 screw B7 i...

Page 40: ...On the right side of the computer press down on the battery cover until it unlocks and pull the battery straight out Figure 4 3 Main Battery Removal WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT Before you start to work on the computer per form the following steps in the sequence indicated 1 Turn off the computer and any attached peripherals 2 Disconnect the computer and any att...

Page 41: ...options bay allows the user to replace the lithium ion battery or diskette drive without turning off or rebooting the computer This feature is sometimes called hot swapping The CD ROM can be inserted or removed while the computer is in suspend mode This feature is sometimes called warm swapping However the CD ROM must be in the computer before or during boot in order for the drivers to load Turn t...

Page 42: ...re 4 6 Diskette Drive Secondary Battery or CD ROM Removal 7 Remove any PC Cards To remove a PC Card from the top connector press the top eject button identified by an arrow pointing up To remove a PC Card from the bottom connector press the bottom eject button identified by an arrow pointing down If you are removing a type III card press the bottom eject button Figure 4 7 PC Card Removal ...

Page 43: ...r Figure 4 8 Releasing a ZIF Connector 2 Pull up gently on the movable part of the connector until it releases the interface cable 3 Grasp the interface cable and pull it out of the connector To reconnect an interface cable to a ZIF connector follow these steps 1 Use the flat blade screwdriver to open the movable part of the ZIF connector 2 Orient the end of the interface cable with the ZIF connec...

Page 44: ...Exploded Views of Components and Assemblies Figure 4 9 Exploded View Computer LCD panel assembly keyboard bottom assembly diskette drive secondary battery or CD ROM hard disk drive main battery heat sink latch 2 power suspend indicator ...

Page 45: ... LM Systems Service Manual Figure 4 10 Exploded View LCD Assembly front bezel LCD panel power suspend indicator inverter board inverter board connector microphone latch back bezel LCD panel flex cable stiffener hinge 2 ...

Page 46: ... cable keyboard LCD flex cable cover power button keyboard screw cover 2 hinge cover touch pad button 2 touch pad touch pad button board infrared lens infrared board plastic housing 2 status display panel board panel board cable speaker 2 touch pad bracket heat sink top assembly spring ...

Page 47: ...Dell Latitude LM Systems Service Manual Figure 4 12 Exploded View Bottom Assembly main board power board audio board cache board I O panel door I O bracket bottom assembly memory module cover processor board ...

Page 48: ...hose parts or assemblies that are replaceable by a customer Table 4 1 Factory Repair Parts and Assemblies Part or Assembly Name Order Name AC Adapter Power Cables AC Adapter service kit CUS ADPT AC EXT 16 2V 34W LMP AC Adapter ADPT AC EXT 16 2V 34W LMP Cable power U S CORD PWR 110V 6F AC ADPT US Cable power Australia CORD PWR 220V 6F AC ADPT AUS Batteries Battery main 42 WH BTRY MAIN 42WHR LIION L...

Page 49: ... Board status display panel CRD CNTRL SPKR LMP Board infrared CRD IR LMP Board audio CRD AUDIO LMP Cable audio board CBL FLEX JK AUD LMP CD ROM CD ROM service kit CUS CD ROM 4X LMP SANYO CD ROM drive CD ROM 4X LMP SANYO Diskette Drive Assembly Diskette drive assembly CUST FD INT EXT LMP Diskette drive internal external FD INT EXT LMP Case upper PLSTC UPR FD LMP Case lower PLSTC LWR FD LMP Cable se...

Page 50: ...BK Hard disk drive 810 MB HD 810MB I F2 12 5MM NN 1 NBK Bracket hard disk drive BRKT HD 12 5MM LMP Screws bracket SCR 3X 5X3 FLH PNH MS ZPS HD Hard disk drive 1 4 GB service kit CUS HD 1 4GB 12 5MM NN 1 NBK Hard disk drive 1 4 GB SUBASSY HD 1 4GB 12 5MM NN NBK Hard disk drive 1 4 GB HD 1 4GB I F2 12 5MM NN 1 NBK Bracket hard disk drive BRKT HD 12 5MM NBK Screws bracket SCR 3X 5X3 FLH PNH MS ZPS HD...

Page 51: ...TN back CVR LCD LMP SANYO Latch LCD right LTCH PLSTC RT LCD LMP Latch LCD left LTCH PLSTC LF LCD LMP Memory Memory module 8 MB service kit CUS MEM 8M LMP Memory module two 4 MB SIMM 4MB LXP Memory module 16 MB service kit CUS MEM 16M LMP Memory module two 8 MB DIMM 8MB 2X32 TL LXP Memory module 32 MB service kit CUS MEM 32M LMP Memory module two 16 MB DIMM 16MB LXP Miscellaneous Parts Cover front ...

Page 52: ...4X8 PHH MS BLO Screw hard disk bracket SCR 3X 5X3 FLH PNH MS ZPS HD Screw heat sink SCR 2X 4X6 PHH MS ZPS Screw keyboard SCR 3X 5X3 FLH PNH MS ZPS KYBD Screw memory module door SCR 2X 4X5 FLH MS BLO Screw I O panel standoff SCR 440X 23 JK MS ZPS Screw expansion connector dock ing port standoff SCR CON JK DCKG LMP Service Documentation Service Manual MNL SERVICE LMP Technical sheet hard disk drive ...

Page 53: ... FLASH UPG F3 LMP LXi Speaker Speaker SPKR AUDIO LMP Insulator speaker INSUL MYLAR SPKR LMP Cover speaker CVR SCR SPKR LMP Top Case Assembly Top case CVR TOP PLSTC SYS BASE LMP Button touch pad right BTN TPAD RT LMP Button touch pad left BTN TPAD LF LMP Spring touch pad or power button SPR PWR KNOB LMP Button power BTN PWR LMP Touch Pad Touch pad assembly ASSY TPAD LMP Cable touch pad CBL FLEX TPA...

Page 54: ...board assembly Processor board CPU daughter board Heat sink Daughter card heat sink assembly Inverter board Invertor PWA Front bezel LCD bezel Flex cable cover Top cover Back bezel LCD back plastics Bottom or base assembly Bottom plastics Top assembly Palm rest plastics Infrared board I R PWA Diskette drive Floppy disk drive ...

Page 55: ...a service provider will delete the password using the following procedure The computer will then be returned to the user Figure 4 13 Capacitor C146 Location To delete the password use the following procedure 1 Open the computer and remove the keyboard See Keyboard found later in this chapter 2 Place a short across the terminals of capacitor C146 3 Allow time for the CMOS battery to recharge C146 ...

Page 56: ...ionary Measures found earlier in this chapter 2 Place the hard disk drive assembly bottom side up on a work surface and remove screws E1 E2 E3 and E4 3 Remove the hard disk drive from the carrier Gently pry the drive from the carrier with a small scribe 4 Lift the hard disk drive out of the bottom case Carefully pry the flex cable connector away from the hard disk drive inter face connector on the...

Page 57: ...ive Figure 4 15 Diskette Drive Assembly The diskette drive resides in a carrier that slides into the options drive bay on the right side of the computer The diskette drive and carrier are replaced as a unit and are not disassembled diskette drive and carrier ...

Page 58: ...21 CD ROM Figure 4 16 CD ROM Assembly The CD ROM resides in a carrier that slides into the options drive bay on the right side of the computer The CD ROM and carrier are replaced as a unit and are not disassembled CD ROM and carrier ...

Page 59: ...ate the memory module toward you and then pull straight up on the module disconnecting the module from the connector on the main board assembly To reinstall a memory module both memory modules must be a matched pair both slots must be filled and both slots must have the same memory capacity The following combinations are possible 16 MB Install two 4 MB memory modules 24 MB Install two 8 MB memory ...

Page 60: ...mbly follow these steps 1 With the computer closed and the back facing you remove the two hinge covers Pop off both of the covers with the heel of your palm or insert your finger tips or a scribe between each cover and the LCD assembly and then lift the covers sideways until they are released from the catches holding them to the computer 2 Remove hinge screws H1 H2 H3 and H4 3 Remove the flex cabl...

Page 61: ...g similar to prop the assembly 4 Use a scribe to pry the front bezel screw covers out of the screw holes in the bezel 5 Remove front bezel screws H6 and H7 6 Separate the front bezel from the back bezel Insert your fingertips in the crevice between the front and back bezel and lift up on the front bezel to release the hidden tabs spaced around the sides When replacing the front bezel orient the be...

Page 62: ...ezel 2 Remove LCD panel screws H11 H12 H13 and H14 3 Remove the LCD Panel NOTE Be careful when removing any part of the LCD flex cable Lift up the LCD panel and disconnect the LCD flex cable connector Dis connect the LCD panel cable from the upper inverter board connector Disconnect the LCD flex cable from the lower inverter board connector LCD panel screws H15 and H16 are 3 mm H11 H12 H13 H14 scr...

Page 63: ...arlier in this section 2 Remove the LCD panel See the previous subsection LCD Panel 3 Disconnect the power suspend indicator connector 4 Remove inverter board screws H15 and H16 5 Remove the inverter board from the back bezel Microphone The microphone cannot be removed separately it is part of the inverter board inverter board H15 H16 power suspend indicator screws H15 and H16 are 3 mm 3 mm ...

Page 64: ...he LCD assembly latches follow these steps 1 Remove the front bezel See Front Bezel found earlier in this section 2 Place the back bezel down on a work surface 3 Use a scribe to pry the latches from the back bezel Be careful not to lose the small spring that is part of each latch latch 2 back bezel spring 2 ...

Page 65: ... the front bezel See Front Bezel found earlier in this section 2 Remove the LCD panel See LCD Panel found earlier in this section 3 Remove the power suspend indicator Disconnect the power status connector from the inverter board Lift the indi cator out of the recess in the top of the back bezel power suspend indicator back bezel power suspend indicator connector inverter board ...

Page 66: ...ction 2 Remove the LCD panel See LCD Panel found earlier in this section NOTE Be careful when removing any part of the LCD flex cable 3 Remove the inverter board See Inverter Board found earlier in this section 4 Remove the latches See LCD Assembly Latches found earlier in this section 5 Remove the power suspend indicator See the previous subsection Power Suspend Indicator back bezel ...

Page 67: ... 4 25 Keyboard Removal To remove the keyboard follow these steps 1 Open the computer 2 Remove the keyboard screw covers 3 Remove keyboard screws S1 and S2 Lay the keyboard back against the LCD assembly or a prop to avoid detach ing the keyboard cable screw covers 2 S1 S2 S4 S3 heat sink keyboard cable main board screws S1 and S2 are 3 mm screws S3 and S4 are 5 5 mm 5 5 mm 3 mm ...

Page 68: ... connector securing the keyboard cable 6 Remove the keyboard from the computer CAUTION Lift away the heat sink gently Rough handling could damage the thermal pad on the bottom of the heat sink CAUTION Lift away the cable only after the ZIF connector is opened see ZIF Connectors found earlier in this chapter Pulling the cable from the connector damages the conductive coating on the end of the cable...

Page 69: ...bsections that follow provide removal and replacement procedures for the components of the top assembly Figure 4 26 Top Assembly Removal hinge cover 2 keyboard touch pad connector main board top assembly bottom assembly screws SD1 and SD2 are 5 mm SD3 5 mm SD4 hook display close button SD1 SD2 screws SD3 and SD4 are 3 mm 3 mm Production Note ...

Page 70: ... around the sides front and back When replacing the top assembly orient the assembly in its original position on the bottom assembly and press firmly near each tab until the hidden tabs snap into place 6 Disconnect the status display board connector Use a small flat blade screwdriver to release the connector from the main board Release the wire bundle from the hook on the I O bracket 7 Remove the ...

Page 71: ...2 and S23 Remove the plastic housing holding the speakers 3 Disconnect the speaker connectors from both ends of the status display board 4 Remove the pieces of plastic tape holding the connector wires to the top assembly 5 Remove the speakers from the top assembly S5 screws S22 and S23 are 6 mm S6 plastic housing 2 speaker 2 speaker connector status display board top assembly 6 mm screws S5 and S6...

Page 72: ...nd S9 3 Disconnect the two speaker connectors and the infrared device connec tor from the status display board 4 Disconnect the status display board connector from the main board The connector wire assembly is held in place by a metal hook located on the I O bracket 5 Remove the status display board from the top assembly status display board screws S7 S9 are 6 mm speaker connector 2 infrared devic...

Page 73: ... top assembly See Top Assembly found earlier in this section 2 Disconnect the I R device connector from the status display board 3 Dislodge the I R device from the recess on the top assembly Thread the I R connector and wires through the opening on the top assembly 4 Remove the I R device from the top assembly top assembly I R connector recess I R lens ...

Page 74: ...e the top assembly See Top Assembly found earlier in this section 2 Remove the status display board See Status Display Board found earlier in this section 3 Remove power button There are four plastic retainers that hold the power button and spring in place 4 Remove the power button and spring from the top assembly power button spring ...

Page 75: ...ard has a flex cable that attaches to the touch pad 3 Remove the touch pad buttons Press down on the touch pad button projections and pull the touch pad but ton out of the recess on the front of the top assembly 4 Remove touch pad bracket screws S14 and S15 Remove the touch pad bracket 5 Remove the touch pad bracket and touch pad from the top assembly top assembly screws S11 S15 are 3 mm S11 S12 S...

Page 76: ...astic base the main board and the main board components The subsections that follow provide removal and replace ment procedures for the components of the bottom assembly Figure 4 32 Bottom Assembly cache board base main board audio board power supply board options bay wall processor board ...

Page 77: ...ollow these steps 1 Open the cover 2 Remove the keyboard See Keyboard found earlier in this chapter 3 Remove the processor board from the main board The processor board is held in place on the main board by two connectors Use a chip removal tool to remove the processor board main board processor board processor board connector 2 ...

Page 78: ...remove the power supply board follow these steps 1 Open the cover 2 Remove the top assembly See Top Assembly found earlier in this chapter 3 Remove the power supply board from the main board The power supply board is held in place on the main board by two connectors power supply board main board ...

Page 79: ...emove the cable from the audio board 4 Remove the audio board from the main board The audio board is held in place on the main board by a connector on one side of the audio board On the other side of the main board the audio board is held in place by a clasp and two projections The clasp and projections are on a plastic holder Lift out the plastic holder audio board main board plastic holder audio...

Page 80: ...ee Power Supply Board found earlier in this section 4 Remove the audio card See the previous subsection Audio Board 5 Remove the black mylar cover on the PC Card cage screws S19 S20 are 5 mm screws ST1 ST6 are 6 5 mm screw ST9 is 4 mm main board I O panel cover S17 S16 S18 S19 S20 ST9 ST6 ST2 ST3 ST4 ST5 ST7 ST1 S8 I O panel bracket screw S18 is 8 mm screws ST7 and ST8 are 4 5 mm screws S16 and S1...

Page 81: ...crews S18 S19 S20 and ST9 S18 has a corner brace that must be removed ST9 is a standoff screw and requires a 5 32 nut driver 9 Bend the options bay wall see Figure 4 32 Press gently on the ends of the wall just enough to free the option bay con nectors on the main board Be careful not to bend the wall in the middle When reinstalling the main board bend the wall back to the vertical position 10 Rem...

Page 82: ...he board follow these steps 1 Open the cover 2 Remove the main board See the previous subsection Main Board 3 Turn the main board over 4 Remove the cache board from the main board The cache board is held in place on the bottom of the main board by two connectors audio board main board cache board ...

Page 83: ...4 46 Dell Latitude LM Systems Service Manual ...

Page 84: ...ssembly illustrated 4 43 removal 4 43 boot routine observing when troubleshooting 2 3 bottom assembly 4 39 C cache board removal 4 45 Caps Lock indicator 1 3 CD ROM disassembly 4 21 CD ROM Hard Disk Drive indicator 1 3 computer features 1 1 illustrated 1 2 power conservation modes 1 6 technical specifications 1 8 computer power 1 6 D Dell diagnostics 3 6 dimming the display 1 6 diskette drive bay ...

Page 85: ... 5 H hard disk drive location 1 2 removal 4 19 headphones speakers connector 1 2 heat sink 4 31 help 2 5 I I O panel 1 2 infrared device removal 4 36 infrared port 1 2 initial procedures beep codes 3 1 system error messages 3 3 troubleshooting 2 1 initialization error messages 3 6 Internal Diskette Drive Access indicator 1 4 interrupt assignments list of 1 7 inverter board removal 4 26 K keyboard ...

Page 86: ...eep codes about 3 1 list of 3 2 power computer 1 6 power button location 1 2 removal 4 37 power conservation 1 6 power status indicator 1 2 power status indicator removal 4 28 power supply board removal 4 41 precautionary measures 4 3 processor board removal 4 40 R removal and replacement procedures field replaceable parts and assemblies 4 1 precautionary measures 4 3 recommended tools 4 1 resourc...

Page 87: ...pecifications 1 8 tools recommended field replaceable parts and assemblies 4 1 top assembly removal 4 32 touch pad location 1 2 removal 4 38 touch pad buttons 1 2 troubleshooting boot routine 2 3 initial procedures 2 1 initial user contact 2 1 POST beep codes 3 1 running the Dell diagnostics 3 6 system error messages 3 3 visual inspection 2 1 turning off the hard disk drive 1 6 U user contact init...

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