Dell OptiPlex 780 Service Manual
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Dell OptiPlex 780 Service Manual

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Dell™ OptiPlex™ 780 Service Manual

Desktop Computer

Working on Your Computer
Removing and Replacing Parts
Specifications
Diagnostics
System Setup
Notes, Cautions, and Warnings
NOTE:
A NOTE indicates important information that helps you make better use of your computer.
CAUTION:
A CAUTION indicates potential damage to hardware or loss of data if instructions are not
followed.
WARNING:
A WARNING indicates a potential for property damage, personal injury, or death.
If you purchased a Dell™ n Series computer, any references in this document to Microsoft® Windows® operating systems are
not applicable.
Information in this document 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, Windows Server, MS-DOS and Windows Vista are either trademarks or registered
trademarks of Microsoft Corporation in the United States and/or other countries.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products.
Dell Inc. disclaims any proprietary interest in trademarks and trade names other than its own.
October 2012
Rev. A02
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Summary of Contents for Dell OptiPlex 780

  • Page 1: Desktop Computer

    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.

  • Page 3: Working On Your Computer

    Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.

  • Page 4: Turning Off Your Computer

    2. Connect any telephone or network cables to your computer. 3. Connect your computer and all attached devices to their electrical outlets. 4. Turn on your computer. 5. Verify that the computer works correctly by running the Dell Diagnostics. See Dell Diagnostics.

  • Page 5: Removing And Replacing Parts

    Back to Contents Page Removing and Replacing Parts Dell™ OptiPlex™ 780 Service Manual—Desktop Cover Optical Drive Primary Hard Drive Secondary Hard Drive (Optional) Floppy Drive (Optional) Riser Cage Expansion Card Standard Back Plate Memory Heat Sink and Processor Power Supply...

  • Page 6: Technical Specifications

    Back to Contents Page Technical Specifications Processor Controls and Lights Memory Network Expansion Bus Audio Video Power System Information System Board Connectors Cards Physical Drives Environmental External Connectors NOTE: Offerings may vary by region. For more information regarding the configuration of your computer, click Start® Help and Support and select the option to view information about your computer.
  • Page 7 Network Integrated Intel integrated network interface card capable of 10/100/1000 Mb/s communication System Information Chipset Intel® Q45 Express chipset w/ICH10DO DMA channels eight Interrupt levels BIOS chip (NVRAM) 64 Mb Expansion Bus Bus type PCI 2.3 PCI Express 2.0 SATA 1.0A and 2.0 eSATA USB 2.0 Bus speed...
  • Page 8 Small form factor one low profile card NOTE: The PCI Express x16 slot is disabled when a display is connected to the integrated video connector. Drives Externally accessible 5.25 inch drive bay(s) for SATA DVD-ROM, DVD+/-RW, or CD +/-RW drives Mini-tower two bays Desktop...
  • Page 9 Desktop two 120-pin connectors Small form factor one 120-pin connector PCI Express x1 data width (maximum) — one PCI Express lane Mini-tower one 36-pin connector Desktop not applicable Small form factor not applicable PCI Express x16 one 164-pin connector data width (maximum) — 16 PCI Express lanes Serial ATA Mini-tower...
  • Page 10 Diagnostic lights four lights. For more information, see Diagnostics. Back of the computer Link integrity light on integrated green — a good 10 Mbps connection network adapter exists between the network and the computer. orange — a good 100 Mbps connection exists between the network and the computer.
  • Page 11 Mini-tower 43.30 cm (17.00 inches) Desktop 35.30 cm (13.90 inches) Small form factor 34.00 cm (13.40 inches) Weight Mini-tower 11.70 kgs (25.80 lbs) Desktop 8.26 kgs (18.20 lbs) Small form factor 6.80 kgs (15.00 lbs) Environmental Temperature Operating 10° to 35°C (50° to 95°F) Storage –40°...

  • Page 12: When To Use The Dell Diagnostics

    2. When the DELL logo appears, press immediately. NOTE: If you see a message stating 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®...

  • Page 13: Power Button Light Codes

    4. When the tests are completed, if you are running the Dell Diagnostics from the Drivers and Utilities disc, remove the disc. 5. Close the test screen to return to the Main Menu screen. To exit the Dell Diagnostics and restart the computer, close the Main Menu screen.

  • Page 14: Beep Codes

    Power is off, light is blank. Initial state of light at power up. Blinking Indicates system has power, but the POWER_GOOD signal is not yet active. Amber If the Hard Drive light is off, it is probable that the power supply needs to be replaced. If the Hard Drive light on, it is probable that an onboard regulator or VRM has failed.

  • Page 15: Diagnostic Lights

    Reseat any installed graphics cards. card failure has If available, install a working graphics card into your computer. occurred. If the problem persists, contact Dell . A possible floppy drive Reseat all power and data cables. or hard drive failure has occurred.
  • Page 16 If available, install working memory of the same type into your computer. If the problem persists, contact Dell. Memory modules are Ensure that no special requirements for memory module/connector detected, but a memory placement exist.

  • Page 17: Entering System Setup

    Menu Press 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 menu. The devices listed on the boot menu depend on the bootable devices installed in the computer. This menu is useful when you are attempting to boot to a particular device or to bring up the diagnostics for the computer.
  • Page 18 Memory information: Displays Installed Memory, Usable Memory, Memory Speed, Memory Channel Mode, Memory Technology, DIMM_1 Size, DIMM_2 Size, DIMM_3 Size, and DIMM_4 Size. . Processor information: Displays the Processor Type, Processor Speed, Processor Bus Speed, Processor L2 cache, Processor ID, Microcode Version, Multi Core Capable and HT Capable 64-bit Technology..
  • Page 19 The Operating System may allocate resources even though the setting is disabled. Serial Port #2 Identifies and defines the serial port settings. You can set the serial port to: Disable Auto (default) COM2 COM4 The Operating System may allocate resources even though the setting is disabled. Miscellaneous Enables or disables the following onboard devices: Devices...
  • Page 20 You can set the TPM security to: Deactivate (default) Activate Clear NOTE: When TPM Security is set to Clear the system setup program clears the user information stored in the TPM. CPU XD Support Enables or disables the execute disable mode of the processor. This option is enabled by default.
  • Page 21 The default IP address is 255.255.255.255 NOTE: You must set the Integrated NIC to Enable with ImageServer to set the ImageServer IP. ImageServer Port Specifies the primary IP port of the image server with which the client software communicates. The default IP port is 06910. Client DHCP Specifies how the client obtains the IP address.

  • Page 22: Removing The Cover

    Back to Contents Page 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.

  • Page 23: Replacing The Cover

    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: Removing The Primary Hard Drive

    Back to Contents Page Primary Hard Drive 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.
  • 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

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

  • Page 28: Removing The Floppy Drive

    Back to Contents Page Floppy Drive 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 Floppy Drive 1.
  • 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

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

  • Page 32: Removing The Expansion Card(S)

    Back to Contents Page Expansion Card(s) 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 Expansion Card(s) 1.
  • 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: Removing The Memory Module(S)

    Back to Contents Page Memory 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 Memory Module(s) 1.

  • Page 35: Replacing The Memory Module(S)

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

  • Page 36: Removing The Power Supply

    Back to Contents Page Power Supply 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 Power Supply 1.
  • 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

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

  • Page 42: Removing The Fan

    Back to Contents Page 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 Fan 1.
  • Page 43 4. Lift the fan and remove it from the computer.

  • Page 44: Replacing The Fan

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

  • Page 45: Removing The System Board

    Back to Contents Page System Board 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 System Board 1.
  • 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

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

  • Page 55: Removing The Optical Drive

    Back to Contents Page Optical Drive 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 Optical Drive 1.
  • 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

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

  • Page 59: Removing The Secondary Hard Drive (Optional)

    Back to Contents Page Secondary Hard Drive (Optional) 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.
  • 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

    Replacing the Secondary Hard Drive To replace the secondary hard drive, perform the above steps in reverse order. Back to Contents Page...
  • Page 63 Back to Contents Page Riser Cage 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 Riser Cage 1.
  • 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 Back to Contents Page Standard Back Plate 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.

  • Page 70: Removing The Heat Sink And Processor

    Back to Contents Page Heat Sink and Processor 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.
  • 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: Replacing The Heat Sink And Processor

    CAUTION: When replacing the processor, do 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: Removing The Coin-Cell Battery

    Back to Contents Page Coin-Cell Battery 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 Coin-Cell Battery 1.

  • Page 77: Replacing The Coin-Cell Battery

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

  • Page 78: Removing The Io Panel

    Back to Contents Page IO Panel 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 IO Panel 1.
  • 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

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

This manual is also suitable for:

Optiplex 780

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