Service Manual

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 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 cage.

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

6. Slide the power supply unit release latches towards the unlock position.

7. Lift and rotate the power-supply unit cage 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 cage towards the chassis until the unit snaps into place.

11. Slide the power supply unit cage release latches towards the locked position.

Post-requisites

Replace the

left-side cover.