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