Dell OptiPlex 780-USFF- User Manual

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 ...

Back to Contents Page System Setup Dell™ OptiPlex™ 760 Ultra Small Form Factor—Service Manual Overview System Setup Options Booting to a USB Device Password Protection Clearing Forgotten Passwords Entering System Setup Boot Sequence Booting to a USB Device Jumper Settings Clearing CMOS Settings Over...

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 funct...

Post Behavior FastBoot When enabled (default), your computer starts more quickly because it skips certain configurations and tests. NumLockLED Enables or disables the NumLock feature when your computer starts. When enabled (default), this option activates the numeric and mathematical features shown ...

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 ch...

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&...

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 — ...

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 passwo...

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 electric...

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 Dia...

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...

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 w...

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 turnin...

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/r...

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

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....

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

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.de...

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

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 Com...

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

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....

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

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...

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

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...

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 o...

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 ww...

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

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.del...

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

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...

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

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....

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

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.de...

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

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 ...

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

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...

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

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/...

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.c...

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

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.del...

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