Replacing the power-supply unit
NOTE: Before working inside your computer, read the safety information that shipped with your computer and follow
the steps in Before working inside your computer. After working inside your computer, follow the instructions in After
working inside your computer. For more safety best practices, see the Regulatory Compliance home page at
www.dell.com/regulatory_compliance.
Procedure
1. Place the power-supply unit on the chassis.
2. Slide the power-supply unit towards the back of the chassis until it snaps into place.
3. Align the screw holes on the power-supply unit with the screw holes on the chassis.
4. Replace the three screws (#6-32x6.35) that secure the power-supply unit to the chassis.
5. Route the power-supply unit cable through the routing guides inside the chassis.
6. Connect the power-supply unit cables (ATX_CPU and ATX_SYS) to the system board.
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Replacing the power-supply unit 55
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