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Power Supply
Dell™ OptiPlex™ 780 Service Manual—Mini-Tower
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 screws that secure the power supply to the back of the computer.
3. Disconnect the hard-drive power cable.