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.
Back to Contents Page Working on Your Computer Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual Before Working Inside Your Computer Recommended Tools Turning Off Your Computer After Working Inside Your Computer Before Working Inside Your Computer Use the following safety guidelines to help protect your computer from potential damage and to help to ensure your personal safety.
Small flat-blade screwdriver Phillips screwdriver Small plastic scribe Flash BIOS update program media Turning Off Your Computer CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer. 1. Shut down the operating system: In Windows Vista®: Click Start , then click the arrow in the lower-right corner of the Start menu as shown below, and then click Shut Down. In Windows® XP: Click Start® Turn Off Computer® Turn Off.
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) Card System Fan Heat Sink and Processor Intrusion Switch Coin-Cell Battery System Board Back to Contents Page Internal Antenna Cable Internal Speaker Memory I/O Board Power Supply
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.
Drives Externally accessible slimline drive bays one bay for SATA DVD-ROM / DVD+/– RW Internally accessible 2.
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% Maximum vibration Operating 5–350 Hz at 0.0002 G 2 /Hz Storage 5–500 Hz at 0.001 to 0.
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.
Back to Contents Page System Setup Dell™ OptiPlex™ 760 Ultra Small Form Factor—Service Manual Overview Entering System Setup System Setup Options Boot Sequence Booting to a USB Device Booting to a USB Device Password Protection Jumper Settings Clearing Forgotten Passwords Clearing CMOS Settings Overview Use System Setup to: Change the system configuration information after you add, change, or remove any hardware in your computer Set or change a user-selectable option such as
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. WARNING: eSATA is designed to function only if the SATA Operation mode in system Setup (BIOS) is set to either IRRT or AHCI. If it is set to ATA, the eSATA functionality is lost though the connector can still be used as a USB port.
Disable AT PS/2 (default) EPP ECP No DMA ECP DMA 1 ECP DMA 3 Parallel Port Address Sets the base I/O address of the integrated parallel port. Serial Port #1 Identifies and defines the serial port settings. You can set the serial port to: Disable Auto (default) COM1 COM3 NOTE: Auto, the default setting, automatically configures a connector to a particular designation (COM1 or COM3).
password to be assigned and verified. This option is not set by default. Password Changes Enables or disables the user from changing the system password without the administrative password. This option is enabled by default. TPM Security Enables or disables the trusted platform module (TPM) security. 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.
Sets the power management suspend mode to: S1 S3 (default) NOTE: If the AMT Management Engine (ME) of the system is disabled, the S1 suspend mode is unavailable in the system setup. Fan Control Override Controls the speed of the system fan. NOTE: When enabled, the fan runs at full speed. Maintenance Service Tag Displays the Service Tag of your computer. Asset Tag Allows you to create a system asset tag if an asset tag is not already set. This option is not set by default.
Post Behavior Fast Boot When enabled (default), your computer starts more quickly because 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.
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. 4. Click Apply to save the changes and then click Exit to exit System Setup and resume the boot process. Booting to a USB Device NOTE: To boot to a USB device, the device must be bootable.
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 at any time (before you press the OK button in step 4). 1. Enter system setup (see Entering System Setup). 2. Select System Password, and verify that Password Status is set to Not Set. 3.
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 — An administrator password is assigned. Disabled — The administrator password is disabled by a jumper setting on the system board.
To change an existing administrator password, you must know the administrator password. 1. Enter system setup (see Entering System Setup). 2. Type the administrator password at the prompt. 3. Highlight Admin Password and press the left- or right-arrow key to delete the existing administrator password. The setting changes to Not Set. To assign a new administrator password, perform the steps in Assigning an Administrator Password. 4. Exit system setup.
1. Follow the procedures in Working on Your Computer. 2. Remove the computer cover. 3. Locate the 2-pin password jumper (PSWD) on the system board, and remove the jumper to clear the password. See Password Protection. 4. Replace the computer cover. 5. Connect your computer and monitor to electrical outlets, and turn them on. 6. After the Microsoft® Windows® desktop appears on your computer, shut down your computer. 7. Turn off the monitor and disconnect it from the electrical outlet. 8.
Back to Contents Page Diagnostics Dell™ OptiPlex™ 780 Ultra Small Form Factor—Service Manual Dell Diagnostics Power Button Light Codes Beep Codes Diagnostic Lights Dell Diagnostics When to Use the Dell Diagnostics It is recommended that you print these procedures before you begin. NOTE: The Dell Diagnostics software works only on Dell computers. NOTE: The Drivers and Utilities media is optional and may not ship with your computer.
6. Select Run the 32 Bit Dell Diagnostics from the numbered list. If multiple versions are listed, select the version appropriate for your computer. 7. When the Dell Diagnostics Main Menu appears, select the test you want to run. Dell Diagnostics Main Menu 1. After the Dell Diagnostics loads and the Main Menu screen appears, click the button for the option you want. Option Function Express Test Performs a quick test of devices.
Amber Blinking Green Solid Green 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. System is in a low power state, either S1 or S3. Look at the diagnostic lights to determine which state the system is in. System is in S0 state, the normal power state of a functioning machine. The BIOS will turn the light to this state to indicate it has started fetching op-codes.
4-4-2 Failure to decompress code to shadowed memory 4-4-3 Math-coprocessor test failure 4-4-4 Cache test failure Diagnostic Lights To help troubleshoot a problem, your computer has four lights labeled 1, 2, 3, and 4 on the bank panel. When the computer starts normally, the lights flash before turning off. If the computer malfunctions, the sequence of the lights help to identify the problem. NOTE: After the computer completes POST, all four lights turn off before booting to the operating system.
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 occurred. Back to Contents Page Ensure that all hard drive and optical drive cables are properly connected to the system board .
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. Removing the Cover NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1.
Replacing the Cover To replace the cover, perform the above steps in reverse order.
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. Removing the Cover NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1.
Replacing the Cover To replace the cover, perform the above steps in reverse order.
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. Removing the Drive Cage NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4.
5. Disconnect the power and data cables from the optical drive. 6. Flip over the drive cage and place it on the computer.
7. Disconnect the power and data cables from the hard drive. 8. Remove the drive cage from the computer.
Replacing the Drive Cage To replace the drive cage, perform the above steps in reverse order.
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. Removing the Optical Drive NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5.
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 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. Removing the WLAN Card NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5.
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.
Replacing the WLAN Card To replace the WLAN card, perform the above steps in reverse order.
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. Removing the System Fan NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5.
6. Release the fan cable from its routing on the computer. 7. Remove the screws that secure the fan to the computer chassis.
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 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. Removing the Heat Sink and Processor NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5.
6. Loosen the captive screws on the heat sink. 7. Lift the heat sink out of the computer.
8. Press the release lever down and out to release the processor cover. 9. Open the processor cover.
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 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. Removing the Intrusion Switch NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5.
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.
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. Removing the Coin-Cell Battery NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5. 6. 7. 8.
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 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. Removing the System Board NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.
12. Disconnect the internal antenna cable. 13. Remove the screws that secure the system board to the computer chassis.
14. Remove the 7 mm hex screw from the system board. 15. Remove the system board from the computer.
Replacing the System Board To replace the system board, perform the above steps in reverse order.
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. Removing the Front Bezel NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1.
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 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. Removing the Hard Drive NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5.
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 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. Removing the Control Panel NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5.
6. Remove the cable from the routing guides on the computer chassis. 7. Remove the screw that secures the control panel to the computer.
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 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. Removing the Internal Antenna Cable NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5.
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.
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 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. Removing the Internal Speaker NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5. 6.
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 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. Removing the Memory Module(s) NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5.
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 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. Removing the I/O Panel NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5.
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.
Replacing the I/O Panel To replace the I/O panel, perform the above steps in reverse order.
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. Removing the Power Supply NOTE: You may need to install Adobe® Flash® Player from Adobe.com in order to view the illustrations below. 1. 2. 3. 4. 5. 6. 7.
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.
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.
