Dell 780- User Manual

Back to Contents Page Diagnostics Dell™ OptiPlex™ 780 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 ...

4. Select the Boot from CD-ROM option from the menu that appears and press <Enter>. 5. Type 1 to start the menu and press <Enter> to proceed. 6. Select Run the 32 Bit Dell Diagnostics from the numbered list. If multiple versions are listed, select the version appropriate for your compute...

Power is off, light is blank. Blinking Amber Initial state of light at power up. Indicates system has power, but the POWER_GOOD signal is not yet active. 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 on...

3-4-3 Search for video ROM failure 4-2-1 No timer tick 4-2-2 Shutdown failure 4-2-3 Gate A20 failure 4-2-4 Unexpected interrupt in protected mode 4-3-1 Memory failure above address 0FFFFh 4-3-3 Timer-chip counter 2 failure 4-3-4 Time-of-day clock stopped 4-4-1 Serial or parallel port test failure 4-...

Back to Contents Page System Setup Dell™ OptiPlex™ 780 Service Manual—Mini -Tower, Desktop, and Small Form Factor Boot Menu Navigation Keystrokes Entering System Setup System Setup Simulation System Setup Menu Options Boot Menu Press <F12> when the Dell™ logo appears to initiate a one -time bo...

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_compli...

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

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/regu...

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

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...

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

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_compl...

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...

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

Back to Contents Page Fan 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_complian...

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

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...

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

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/regulator...

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

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....

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

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_c...

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

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/reg...

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...

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

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/regul...

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 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_com...

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