Lenovo IdeaCentre K220 - Manual (Page 46)

Chapter 7. Replacing hardware
43
Replacing the power supply
Attention
Do not remove the computer cover or attempt any repair before
reading the “Important safety information” in the Safety and Warranty
Guide that was included with your computer or in the Hardware
Maintenance Manual (HMM) for the computer. To obtain copies of
the Safety and Warranty Guide or HMM, go to the Support Web site at
http://www.lenovo.com/support.
To replace the power supply:
1. Remove the computer cover. Refer to “Removing the computer cover”.
Note: For this procedure, it helps to lay the computer on its side.
2. Disconnect the power supply cables from the system board and from
all drives. Refer to “Identifying parts on the system board”.
3. Remove the four screws that secure the power supply at the rear of the
chassis.
4. Lift the power supply out of the chassis.
5. Install the new power supply into the chassis so that the screw holes in
the power supply align with those in the chassis.
6. Install the four screws to secure the power supply. Note: Use only the
screws provided by Lenovo.
7. Reconnect the power supply connectors to the system board.