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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:
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1. Follow the procedures in
2. Remove the cover.
3. Remove the
front
4. Remove the
drive
5. Remove the
heat sink and
6. Remove the
power
7. Remove the memory.
8. Remove the
I/O
board.
9. Remove the
wireless local area network
10. Remove the
internal
11. Disconnect the optical-drive, hard-drive, internal speaker, and control-panel cables from the system board.
Before Working Inside Your
bezel.
cage.
processor.
supply.
card.
speaker.
Computer.