Replacing The Power Supply - Lenovo ThinkCentre 8290 Hardware Maintenance Manual

Replacing the power supply

Attention
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 servicable parts inside
these components.
1. Remove the cover. See "Removing the covers" on page 86.
2. Remove the drive bay assembly. See "Removing and replacing the drive bay
assembly" on page 116.
3. Disconnect all power supply cables from the drives.
4. Disconnect all power supply cables from the system board. See "Identifying
parts on the system board (Types 8293, 8294, and 8295" on page 114 or
"Identifying parts on the system board (Types 9217, 9218, and 9219" on page
115.
5. Remove the hard disk drive. See "Replacing the hard disk drive" on page 131.
6. The system board must be moved out of the way to remove the power supply.
Remove the screws that secure the system board to the chassis and slide the
system board away from the power supply.
Note: You do not have to remove the system board from the chassis to
remove the power supply.
7. At the rear of the chassis, remove the three screws that secure the power
supply. Also remove the screw that secures the power supply at the front.
8. Lift the power supply out of the chassis.
Chapter 9. Replacing FRUs (Types 8293, 8294, 8295, 9217, 9218, and 9219
121