Lenovo 7823, 7782, 7824, 7783, 7821 manual Removing the screws for the power supply assembly

CAUTION:

Never remove the cover on a power supply or any part that has the following label attached.

Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a problem with one of these parts, contact a service technician.

To replace the power supply assembly, do the following:

1.Turn off the computer and disconnect all power cords from electrical outlets.

2.Remove the computer cover. See “Removing the computer cover” on page 26.

3.Disconnect the power supply assembly cables from the system board and all drives. See “Locating parts on the system board” on page 11.

4.Release the power supply assembly cables from the cable clips and ties in the chassis.

5.Lay the computer on its side and remove the four screws at the rear of the chassis that secure the power supply assembly.

Figure 24. Removing the screws for the power supply assembly

6.Slide the power supply assembly to the front of the computer and then lift it out of the chassis.

7.Ensure that the new power supply assembly is the correct replacement.

8.Install the new power supply assembly into the chassis so that the screw holes in the power supply assembly align with those in the chassis.

9.Install and tighten the four screws to secure the power supply assembly.

Chapter 4. Installing or replacing hardware 37