Lenovo THINKCENTRE 8177 - Manual (Page 104)

Removing and 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 cover” on page 92.
2. Disconnect all power supply cables from the drives.
3. Disconnect all power supply cables from the system board. See “Identifying
parts on the system board” on page 95.
4. Support the power supply and remove the four screws that hold the power
supply in place.
5. Remove the power supply.
6. Install the new power supply and insert the four screws that hold the power
supply in place.
7. Reconnect all power supply cables to the system board and the drives. See
“Identifying parts on the system board” on page 95.
8. Go to “Closing the cover and connecting cables” on page 104.
98 Hardware Maintenance Manual