Dell OptiPlex 780 - System Board Replacement

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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. Follow the procedures in Before Working Inside Your Computer.
2. Remove the riser cage.
3. Remove the heat sink and processor.
4. Remove the memory
.
5. Disconnect the floppy-drive data cable from the system board.