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Cover

Dell™ OptiPlex™ 780 Service Manual—Desktop

WARNING:

Before working inside your computer, read the safety information that shipped with your

computer. For additional safety best practices information, see the Regulatory Compliance Homepage at

www.dell.com/regulatory_compliance.

Removing the Cover

NOTE:

You may need to install Adobe Flash Player from

Adobe.com

to view the following illustrations.

1. Follow the procedures in

Before Working Inside Your Computer

2. Pull back the cover release latch.

Summary of Contents for OptiPlex 780

Page 1: ...cument is subject to change without notice 2009 Dell Inc All rights reserved Reproduction of this material in any manner whatsoever without the written permission of Dell Inc is strictly forbidden Trademarks used in this text Dell the DELL logo OptiPlex are trademarks of Dell Inc Intel Core and Celeron are registered trademarks of Intel Corporation in the U S and other countries Microsoft Windows ...

Page 2: ......

Page 3: ...e computer CAUTION Handle components and cards with care Do not touch the components or contacts on a card Hold a card by its edges or by its metal mounting bracket Hold a component such as a processor by its edges not by its pins CAUTION When you disconnect a cable pull on its connector or on its pull tab not on the cable itself Some cables have connectors with locking tabs if you are disconnecti...

Page 4: ...ess is complete 2 Ensure that the computer and all attached devices are turned off If your computer and attached devices did not automatically turn off when you shut down your operating system press and hold the power button for about 6 seconds to turn them off After Working Inside Your Computer After you complete any replacement procedure ensure you connect any external devices cards and cables b...

Page 5: ... Service Manual Desktop Cover Primary Hard Drive Floppy Drive Optional Expansion Card Memory Power Supply Fan System Board Optical Drive Secondary Hard Drive Optional Riser Cage Standard Back Plate Heat Sink and Processor Coin Cell Battery IO Panel Back to Contents Page ...

Page 6: ... form factor computers Processor Type Intel Core 2 Duo FSB up to 1333 MHz Intel Core 2 Quad FSB up to 1333 MHz Intel Pentium Dual Core FSB up to 1066 MHz Intel Celeron FSB up to 800 MHz Level 2 L2 cache at least 512 KB pipelined burst eight way set associative writeback SRAM Memory Type DDR3 SDRAM non ECC memory only Speed 1067 MHz Connectors four Capacity 1 GB 2 GB or 4 GB non ECC Minimum memory ...

Page 7: ...I Express x1 slot bidirectional speed 250 MB s x16 slot bidirectional speed 8 GB s SATA 1 5 Gbps and 3 0 Gbps eSATA 3 0 Gbps USB 480 Mbps Cards PCI Mini tower Desktop Small form factor up to two full height cards without riser card up to two low profile cards with riser card up to two full height cards one low profile card PCI Express x1 Mini tower Desktop Small form factor one full height card no...

Page 8: ... Mini tower Desktop Small form factor for hard drives two bays one bay one bay NOTE Your computer can support up to two 2 5 inch hard drives with brackets External Connectors Audio Back panel two connectors for line in microphone and line out Front panel two front panel connectors for headphones and microphone eSATA one 7 pin connector Network one RJ45 connector Parallel one 25 pin connector bidir...

Page 9: ...nt panel control one 40 pin connector Processor one 775 pin connector Power 12V one 4 pin connector Power one 24 pin connector Controls and Lights Front of the computer Power button push button Power light blinking green indicates that the computer is in sleep state solid green indicates that the computer is in power on state blinking amber indicates a problem with the system board solid amber ind...

Page 10: ...t indicates that network activity is present Power DC power supply Wattage Mini tower Desktop Small form factor 305 W non EPA or 255 W EPA 255 W EPA 235 W EPA Maximum heat dissipation Mini tower Desktop Small form factor 1041 BTU hr 955 BTU hr 938 BTU hr Voltage 90 265 VAC 50 60 Hz Coin cell battery 3 V CR2032 lithium coin cell NOTE Heat dissipation is calculated by using the power supply wattage ...

Page 11: ...maximum wet bulb temperature 29 C storage 5 to 95 maximum wet bulb temperature 38 C Maximum vibration Operating 5 to 350 Hz at 0 0002 G2 Hz Storage 5 to 500 Hz at 0 001 to 0 01 G2 Hz Maximum shock Operating 40 G 5 with pulse duration of 2 msec 10 equivalent to 20 in sec 51 cm sec Storage 105 G 5 with pulse duration of 2 msec 10 equivalent to 50 in sec 127 cm sec Altitude Operating 15 2 to 3048 m 5...

Page 12: ...ing that no diagnostics utility partition has been found run the Dell Diagnostics from your Drivers and Utilities media If you wait too long and the operating system logo appears continue to wait until you see the Microsoft Windows desktop Then shut down your computer and try again 3 When the boot device list appears highlight Boot to Utility Partition and press Enter 4 When the Dell Diagnostics M...

Page 13: ...ription and follow the instructions on the screen 3 If you run a test from the Custom Test or Symptom Tree option click the applicable tab described in the following table for more information Tab Function Results Displays the results of the test and any error conditions encountered Errors Displays error conditions encountered error codes and the problem description Help Describes the test and may...

Page 14: ...nnot display error messages during the POST the computer may emit a series of beeps that identifies the problem or that can help you identify a faulty component or assembly The following table lists the beep codes that may be generated during the POST Most beep codes indicate a fatal error that prevents the computer from completing the boot routine until the indicated condition is corrected Code C...

Page 15: ... lights are not lit after the computer successfully boots to the operating system Plug the computer into a working electrical outlet If the problem persists contact Dell A possible processor failure has occurred Reseat the processor see Processor information for your computer If the problem persists contact Dell Memory modules are detected but a memory failure has occurred If two or more memory mo...

Page 16: ...as occurred Determine if a conflict exists by removing an expansion card not a graphics card and restarting the computer If the problem persists reinstall the card you removed then remove a different card and restart the computer Repeat this process for each expansion card installed If the computer starts normally troubleshoot the last card removed from the computer for resource conflicts If the p...

Page 17: ...s Alt F or Load Defaults menu option Entering System Setup Your computer offers the following BIOS and System Setup options Bring up a one time boot menu by pressing F12 Access System Setup by pressing F2 F12 Menu Press F12 when the Dell logo appears to initiate a one time boot menu with a list of the valid boot devices for the computer Diagnostics and Enter Setup options are also included in this...

Page 18: ...ces assigned to the drive controller RAID Mode is incompatible with ImageServer Please disable RAID mode if enabling Image Server S M A R T Reporting This field controls whether hard drive errors for integrated drives are reported during system startup This technology is part of the SMART Self Monitoring Analysis and Reporting Technology specification This option is disabled by default Drives Enab...

Page 19: ...not complete installation when the maximum CPUID Function supported is greater than 3 This option is disabled by default HDD Acoustic Mode This option allows you to optimize your hard drives performance and acoustic noise level based on your personal preferences Bypass default Do nothing needed for older drives Quiet The drive is slower but quieter Suggested Allow drive manufacturer to select the ...

Page 20: ... surge protector or if Auto Power On is set to disabled Low Power Mode Enables or disables low power mode This option is disabled by default When low power mode is enabled the integrated network card is disabled when the system is shutdown or in Hibernate mode Only Add in NIC cards will be able to remotely wake the system Remote Wake up Allows the system to power up when a network interface contro...

Page 21: ...ecause it skips certain configurations and tests NumLock LED Enables or disables the NumLock feature when your computer starts When enabled default this option activates the numeric and mathematical features shown at the top of each key When disabled this option activates the cursor control functions labeled on the bottom of each key POST Hotkeys Allows you to specify the function keys to display ...

Page 22: ...h your computer For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Cover NOTE You may need to install Adobe Flash Player from Adobe com to view the following illustrations 1 Follow the procedures in Before Working Inside Your Computer 2 Pull back the cover release latch ...

Page 23: ...3 Tilt the cover outward from the top and then remove the cover from the computer Replacing the Cover To replace the cover perform the steps above in reverse order Back to Contents Page ...

Page 24: ...onal safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Primary Hard Drive 1 Follow the procedures in Before Working Inside Your Computer 2 Remove the optical drive from the computer 3 If present remove the secondary hard drive from the computer 4 Disconnect the hard drive data cable 5 Disconnect the hard drive power cable ...

Page 25: ...6 Press in on the blue securing tabs on each side of the drive and then slide the drive towards the back of the computer ...

Page 26: ...7 Lift the hard drive and remove it from the system ...

Page 27: ...Replacing the Primary Hard Drive To replace the hard drive perform the above steps in reverse order Back to Contents Page ...

Page 28: ...formation that shipped with your computer For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Floppy Drive 1 Follow the procedures in Before Working Inside Your Computer 2 Disconnect the floppy drive data cable 3 Disconnect the floppy drive power cable ...

Page 29: ...4 Pull up on the drive release latch and then slide the floppy drive towards the back of the computer ...

Page 30: ...5 Lift the floppy drive up and away from the computer ...

Page 31: ...Replacing the Floppy Drive To replace the floppy drive peform the above steps in reverse order Back to Contents Page ...

Page 32: ...tional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Expansion Card s 1 Follow the procedures in Before Working Inside Your Computer 2 Rotate the release tab on the card retention latch upwards 3 Gently pull the release lever away from the card and then ease the card up and out of its connector on the system board ...

Page 33: ...Replacing the Expansion Card s To replace the expansion card perform the above steps in reverse order Back to Contents Page ...

Page 34: ...r For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Memory Module s 1 Follow the procedures in Before Working Inside Your Computer 2 Press out on the securing clips at each end of the memory module connector 3 Lift the memory module out of the connector and remove it from the computer ...

Page 35: ...Replacing the Memory Module s To replace the memory module s perform the above steps in reverse order Back to Contents Page ...

Page 36: ...practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Power Supply 1 Follow the procedures in Before Working Inside Your Computer 2 Remove the optical drive 3 Remove the secondary hard drive if present 4 Remove the hard drive 5 Disconnect the main power connector from the system board 6 Disconnect the processor power connector from the syst...

Page 37: ...7 Release the processor power connector cable from routing guides under the system board ...

Page 38: ...8 Remove the screws that secure the power supply to the back of the chassis ...

Page 39: ...9 Press the power supply release latch at the bottom of the chassis and then slide the power supply towards the front of the computer ...

Page 40: ...10 Lift the power supply up and away from the computer ...

Page 41: ...Replacing the Power Supply To replace the power supply perform the above steps in reverse order Back to Contents Page ...

Page 42: ...h your computer For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Fan 1 Follow the procedures in Before Working Inside Your Computer 2 Disconnect the fan power cable from the system board 3 Pull out the fan retention tab and then shift the fan towards the system board ...

Page 43: ...4 Lift the fan and remove it from the computer ...

Page 44: ...Replacing the Fan To replace the fan perform the above steps in reverse order Back to Contents Page ...

Page 45: ...ur computer For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the System Board 1 Follow the procedures in Before Working Inside Your Computer 2 Remove the riser cage 3 Remove the heat sink and processor 4 Remove the memory 5 Disconnect the floppy drive data cable from the system board ...

Page 46: ...6 Disconnect the fan power cable 7 Disconnect the main power cable from the system board ...

Page 47: ...8 Disconnect the IO panel cable ...

Page 48: ...9 Disconnect the optical drive data cable from the system board ...

Page 49: ...10 Disconnect the hard drive data cable from the system board ...

Page 50: ...11 Disconnect the processor power cable ...

Page 51: ...12 Remove the screws that secure the system board to the computer chassis ...

Page 52: ...13 Remove the heat sink assembly bracket ...

Page 53: ...14 To remove the system board slide the system board towards the back of the computer and lift the system board up and away from the computer ...

Page 54: ...Replacing the System Board To replace the system board perform the above the steps in reverse order Back to Contents Page ...

Page 55: ...ormation that shipped with your computer For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Optical Drive 1 Follow the procedures in Before Working Inside Your Computer 2 Disconnect the optical drive data cable 3 Disconnect the optical drive power cable ...

Page 56: ...4 Lift the drive release latch and then slide the drive towards the back of the computer ...

Page 57: ...5 Lift and remove the drive from the computer ...

Page 58: ...Replacing the Optical Drive To replace the optical drive perform the steps above in reverse order Back to Contents Page ...

Page 59: ...formation that shipped with your computer For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Secondary Hard Drive Optional 1 Follow the procedures in Before Working Inside Your Computer 2 Remove the optical drive from the computer 3 Disconnect the hard drive data cable ...

Page 60: ...4 Disconnect the hard drive power cable 5 Pull up on the release latch and then slide the hard drive towards the back of the computer ...

Page 61: ...6 Lift the hard drive and remove it from the computer ...

Page 62: ...Replacing the Secondary Hard Drive To replace the secondary hard drive perform the above steps in reverse order Back to Contents Page ...

Page 63: ...hipped with your computer For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Riser Cage 1 Follow the procedures in Before Working Inside Your Computer 2 Disconnect the PS 2 serial port cable from the system board 3 Pivot the riser cage handle to an upright position ...

Page 64: ...4 Gently pull the riser cage handle and lift the riser cage up and away from the computer ...

Page 65: ...5 On the riser cage rotate the card retention latch upward ...

Page 66: ...6 Gently pull the card release latch on the riser board away from the card and ease the card out of its connector ...

Page 67: ...Replacing the Riser Cage To replace the riser cage perform the above steps in reverse order Back to Contents Page ...

Page 68: ...actices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Standard Back Plate 1 Follow the procedures in Before Working Inside Your Computer 2 Remove the riser cage 3 Gently lift the standard back plate and remove from the computer Replacing the Standard Black Plate To replace the standard black plate perform the above steps in reverse order Back...

Page 69: ......

Page 70: ...the safety information that shipped with your computer For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Heat Sink and Processor 1 Follow the procedures in Before Working Inside Your Computer 2 Loosen the captive screws on each side of the heat sink ...

Page 71: ...3 Rotate the heat sink upwards 4 Lift the heat sink and remove it from the computer ...

Page 72: ...5 Open the processor cover by sliding the release lever from under the cover latch on the socket Then pull the lever back to release the processor cover ...

Page 73: ...6 Lift the processor cover ...

Page 74: ...7 Remove the processor from the computer ...

Page 75: ...o not touch any of the pins inside the socket or allow any objects to fall on the pins in the socket Replacing the Heat Sink and Processor To replace the heat sink and processor perform the above steps in reverse order Back to Contents Page ...

Page 76: ...hat shipped with your computer For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the Coin Cell Battery 1 Follow the procedures in Before Working Inside Your Computer 2 Pull the retention clip away from the coin cell battery 3 Remove the coin cell battery from the system ...

Page 77: ...Replacing the Coin Cell Battery To replace the coin cell battery perform the above steps in reverse order Back to Contents Page ...

Page 78: ...that shipped with your computer For additional safety best practices information see the Regulatory Compliance Homepage at www dell com regulatory_compliance Removing the IO Panel 1 Follow the procedures in Before Working Inside Your Computer 2 Disconnect and remove the IO panel cable 3 Remove the screw that secures the IO panel to the computer ...

Page 79: ...4 Gently rotate the IO panel away from the computer and then remove it from the computer ...

Page 80: ...Replacing the IO Panel To replace the IO panel perform the above steps in reverse order Back to Contents Page ...

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