Lenovo M91p 4480 User Manual page 61

DANGER
Hazardous moving parts. Keep fingers and other body parts away.
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 32.
3. Disconnect the power supply assembly cables from the system board and all drives. See "Locating
parts on the system board" on page 12.
4. Release the power supply assembly cables from the cable clips and ties in the chassis.
.
Chapter 5 Installing or replacing hardware
47