Dell OptiPlex 380 (Late 2009) - Manual (Page 43)

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System Board
Dell™ OptiPlex™ 380 Service Manual— Small Form Factor
Removing the System Board
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove the optical drive .
3. Remove the hard drive .
4. Remove the expansion card(s) .
5. Remove the memory .
6. Remove the heat sink and processor .
7. Disconnect the processor power cable from the system board.
9. Disconnect the hard-drive and optical-drive data cables from the system board.
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.