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Dell OptiPlex 780 Ultra Small Form Factor Service Manual
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Dell OptiPlex 780 Ultra Small Form Factor Service Manual

Ultra small form factor
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Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service
Manual
Working on Your Computer
Removing and Replacing Parts
Specifications
System Board Layout
System Setup
Diagnostics
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.
© 2010 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, and OptiPlex are trademarks of Dell Inc.; ATI Radeon is a trademarks of
Advanced Micro Devices, Inc; Intel, Pentium, Celeron, and Core are either trademarks or registered trademarks of Intel Corporation; Blu-ray Disc is a
trademark of the Blu-ray Disc Association; Microsoft, Windows, Windows Vista, and the Windows Vista start button 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. A01

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Summary of Contents for Dell OptiPlex 780 Ultra Small Form Factor

  • Page 1 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.

  • Page 2: Working On Your Computer

    CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface, such as a connector on the back of the computer.

  • Page 3: 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 4: Removing And Replacing Parts

    Back to Contents Page Removing and Replacing Parts Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual Cover Front Bezel Drive Cage Hard Drive Optical Drive Control Panel Wireless Local Area Network (WLAN) Internal Antenna Cable Card Internal Speaker System Fan...

  • Page 5: Specifications

    Back to Contents Page Specifications Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 6 Drives Externally accessible slimline drive bays one bay for SATA DVD-ROM / DVD+/– Internally accessible 2.5-inch drive bays External Connectors Audio back panel two connectors: line-out (headphone) and line-in (microphone) front panel two connectors: line-out (headphone) and line-in (microphone) Network one RJ45 connector Serial one 9-pin connector;...
  • Page 7 Height 23.7 cm (9.3 inches) Width 6.5 cm (2.6 inches) Depth 24.0 cm (9.4 inches) Weight 3.2 kg (7 lb) Environmental Temperature Operating 10 °C to 35 °C (50 °F to 95 °F) Storage –40 °C to 65 °C (–40 °F to 149 °F) Relative humidity (noncondensing) operating: 20% to 80% storage: 5% to 95%...

  • Page 8: System Board Layout

    Back to Contents Page System Board Layout Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 9: Entering System Setup

    Entering System Setup 1. Turn on (or restart) your computer. 2. When the DELL™ logo is displayed, watch for the F12 prompt to appear. 3. Press <F12> immediately. The Boot Menu appears. 4. Use the up and down arrow keys to select System Setup and then press <Enter>.

  • Page 10: System Setup Options

    Use the Tab and Up/Down arrow keys on your keyboard to navigate or click to navigate using the mouse. System Setup Options NOTE: Depending on your computer and installed devices, the items listed in this section may not appear, or may not appear exactly as listed.
  • Page 11 Disable PS/2 (default) ECP No DMA ECP DMA 1 ECP DMA 3 Sets the base I/O address of the integrated parallel port. Parallel Port Address Identifies and defines the serial port settings. You can set the serial port to: Serial Port #1 Disable Auto (default) COM1...
  • Page 12 password to be assigned and verified. This option is not set by default. Enables or disables the user from changing the system password without the administrative Password Changes password. This option is enabled by default. Enables or disables the trusted platform module (TPM) security. TPM Security You can set the TPM security to: Deactivate (default)
  • Page 13 Sets the power management suspend mode to: S3 (default) NOTE: If the AMT Management Engine (ME) of the system is disabled, the S1 suspend mode is unavailable in the system setup. Controls the speed of the system fan. Fan Control Override NOTE: When enabled, the fan runs at full speed.

  • Page 14: Option Settings

    Post Behavior When enabled (default), your computer starts more quickly because it skips certain configurations and tests. Fast Boot Enables or disables the NumLock feature when your computer starts. NumLock When enabled (default), this option activates the numeric and mathematical features shown at the top of each key.

  • Page 15: Booting To A Usb Device

    Changing the Boot Sequence for Future Boots 1. Enter System Setup (see Entering System Setup). 2. Click to expand SystemBoard and then click Boot Sequence. 3. Highlight the appropriate device from the list of devices on the right and then click the up or down arrows to move the item you want to change.

  • Page 16: Assigning A System Password

    You can only assign a system password when the following option is displayed: Not Set — No system password is assigned and the password jumper on the system board is in the enabled position (the default setting). Assigning a System Password To exit without assigning a system password, press <Esc>...

  • Page 17: Assigning An Administrator Password

    computer, and then repeat steps 3 and 4. 5. To assign a new password, follow the procedure in Assigning a System Password. 6. Exit system setup. Administrator Password Option Settings You cannot change or enter a new administrator password if either of the following two options is displayed: Set —...

  • Page 18: Clearing Forgotten Passwords

    Clearing Forgotten Passwords 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. CAUTION: This process erases both the system and administrator passwords.

  • Page 19: Clearing Cmos Settings

    Clearing CMOS Settings 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. 1. Follow the procedures in Working on Your Computer.

  • Page 21: When To Use The Dell Diagnostics

    2. When the DELL logo appears, press <F12> 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 22: 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 23: Beep Codes

    Amber Second state of the light at power up. Indicates the POWER_GOOD signal is active and it is probable that the power supply is fine. Look at the diagnostic lights for further information. Blinking Green System is in a low power state, either S1 or S3. Look at the diagnostic lights to determine which state the system is in.

  • Page 24: 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 25 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 problem persists, contact Dell. Another failure has Ensure that all hard drive and optical drive cables are properly occurred.

  • Page 26: Removing The Cover

    Back to Contents Page Cover Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 27: Replacing The Cover

    Replacing the Cover To replace the cover, perform the above steps in reverse order. Back to Contents Page...
  • Page 28 Back to Contents Page Cover Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 29 Replacing the Cover To replace the cover, perform the above steps in reverse order. Back to Contents Page...

  • Page 30: Removing The Drive Cage

    Back to Contents Page Drive Cage Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 31 5. Disconnect the power and data cables from the optical drive. 6. Flip over the drive cage and place it on the computer.
  • Page 32 7. Disconnect the power and data cables from the hard drive. 8. Remove the drive cage from the computer.

  • Page 33: Replacing The Drive Cage

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

  • Page 34: Removing The Optical Drive

    Back to Contents Page Optical Drive Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 35: Replacing The Optical Drive

    6. Remove the optical-drive bracket from the optical-drive assembly. Replacing the Optical Drive To replace the optical drive, perform the above steps in reverse order. Back to Contents Page...

  • Page 36: Wireless Local Area Network (Wlan) Card

    Back to Contents Page Wireless Local Area Network (WLAN) Card Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 37 6. Push the levers that secure the WLAN card to the computer away from the WLAN card. 7. Remove the WLAN card from the connector on the system board.

  • Page 38: Replacing The Wlan Card

    Replacing the WLAN Card To replace the WLAN card, perform the above steps in reverse order. Back to Contents Page...

  • Page 39: Removing The System Fan

    Back to Contents Page System Fan Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 40 6. Release the fan cable from its routing on the computer. 7. Remove the screws that secure the fan to the computer chassis.

  • Page 41: Replacing The System Fan

    8. Remove the system fan from the computer. Replacing the System Fan To replace the system fan, perform the above steps in reverse order. Back to Contents Page...

  • Page 42: Removing The Heat Sink And Processor

    Back to Contents Page Heat Sink and Processor Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 43 6. Loosen the captive screws on the heat sink. 7. Lift the heat sink out of the computer.
  • Page 44 8. Press the release lever down and out to release the processor cover. 9. Open the processor cover.

  • Page 45: Replacing The Heat Sink And Processor

    10. Remove the processor from the system board. 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 46: Removing The Intrusion Switch

    Back to Contents Page Intrusion Switch Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 47 6. Slide the chassis intrusion switch out of its slot in the metal bracket, and then push it down through the square hole in the bracket to remove the switch and its attached cable from the computer. Replacing the Intrusion Switch To replace the intrusion switch, perform the above steps in reverse order.

  • Page 48: Removing The Coin-Cell Battery

    Back to Contents Page Coin-Cell Battery Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 49: Replacing The Coin-Cell Battery

    9. Lift the coin-cell battery up and remove it from the system board. Replacing the Coin-Cell Battery To replace the coin-cell battery, perform the above steps in reverse order. Back to Contents Page...

  • Page 50: Removing The System Board

    Back to Contents Page System Board Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 51 12. Disconnect the internal antenna cable. 13. Remove the screws that secure the system board to the computer chassis.
  • Page 52 14. Remove the 7 mm hex screw from the system board. 15. Remove the system board from the computer.

  • Page 53: Replacing The System Board

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

  • Page 54: Removing The Front Bezel

    Back to Contents Page Front Bezel Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 55: Replacing The Front Bezel

    4. Rotate the front bezel away from the computer. 5. Remove the front bezel from the computer. Replacing the Front Bezel To replace the front bezel, perform the above steps in reverse order. Back to Contents Page...

  • Page 56: Removing The Hard Drive

    Back to Contents Page Hard Drive Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 57: Replacing The Hard Drive

    6. Slide the hard drive out of the drive cage and remove the hard drive from the computer. Replacing the Hard Drive To replace the hard drive, perform the above steps in reverse order. Back to Contents Page...

  • Page 58: Removing The Control Panel

    Back to Contents Page Control Panel Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 59 6. Remove the cable from the routing guides on the computer chassis. 7. Remove the screw that secures the control panel to the computer.

  • Page 60: Replacing The Control Panel

    8. Remove the control panel from the computer. Replacing the Control Panel To replace the control panel, perform the above steps in reverse order. Back to Contents Page...
  • Page 61 Back to Contents Page Internal Antenna Cable Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 62 6. Remove the internal antenna cable from the routing guides on the computer chassis. 7. Carefully release the internal antenna port from the computer chassis.
  • Page 63 8. Remove the internal antenna cable from the computer. Replacing the Internal Antenna Cable To replace the internal antenna cable, perform the above steps in reverse order. Back to Contents Page...

  • Page 64: Removing The Internal Speaker

    Back to Contents Page Internal Speaker Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 65: Replacing The Internal Speaker

    7. Push in on the release tab and rotate the speaker to release it from the computer chassis. 8. Remove the speaker from the computer. Replacing the Internal Speaker To replace the internal speaker, perform the above steps in reverse order. Back to Contents Page...

  • Page 66: Removing The Memory Module(S)

    Back to Contents Page Memory Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 67: Replacing The Memory Module(S)

    6. Lift the memory module out of the connector and remove it from the computer. Replacing the Memory Module(s) To replace the memory, perform the above steps in reverse order. Back to Contents Page...

  • Page 68: Removing The I/O Panel

    Back to Contents Page I/O Panel Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 69 6. Remove the screws that secure the I/O panel to the computer chassis. 7. Remove the I/O board by pulling it away from the computer.

  • Page 70: Replacing The I/O Panel

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

  • Page 71: Removing The Power Supply

    Back to Contents Page Power Supply Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual 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 72 8. Remove the screw that secures the power supply to the system board. 9. Remove the screws that secure the power supply to the computer chassis.

  • Page 73: Replacing The Power Supply

    10. Slide the power supply towards the fan and remove it from the computer. Replacing the Power Supply To replace the power supply, perform the above steps in reverse order. Back to Contents Page...

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Optiplex 780

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