Dell OptiPlex 780 - Power Supply Unit Replacement

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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_compliance.
Removing the Power Supply
1. Follow the procedures in Before Working Inside Your Computer.
2. Remove the optical drive
.
3. Remove the secondary hard drive
(if present).
4. Remove the hard drive
.
5. Disconnect the main power connector from the system board.
6. Disconnect the processor power connector from the system board.