Service Manual

Replacing the power-supply

unit

WARNING: 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 on the chassis.

2 Align the screw holes on the power-supply unit with the screw holes on the

chassis.

3 Replace the screws that secure the power-supply unit to the chassis.

4 Align the screw holes on the power-supply unit bracket with the screw

holes on the power-supply unit.

5 Replace the screws that secure the power-supply unit bracket to the

power-supply unit.

6 Slide the power supply unit release latches towards the top of the

computer.

7 Lift and rotate the power-supply unit away from the chassis while pressing

and holding the graphics-card bracket.

8 Connect the power cables to the graphics card, hard drives, and optical

drive.

9 Connect the processor-power cable and system-board power cable to the

system board.

10 Rotate the power-supply unit towards the chassis until the unit snaps into

place.

11 Slide the power supply unit release latches towards the bottom of the

computer.

Post-requisites

Replace the left-side cover.