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What to do next:
v To work with another option, go to the appropriate section.
v To complete the installation, go to “Completing the parts replacement” on
page 45.
Replacing the power supply assembly
Attention
Do not open your computer or attempt any repair before reading and understanding the
“Important safety information” in the ThinkCentre Safety and Warranty Guide that came with
your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide,goto:
http://www.lenovo.com/support
This section provides instructions on how to replace the power supply assembly.
To replace the power supply assembly:
1. Remove all media from the drives and turn off all attached devices and the
computer. Then, disconnect all power cords from electrical outlets and
disconnect all cables that are connected to the computer.
2. Remove the computer cover. See “Removing the computer cover” on page 16.
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. Lay the computer on its side and remove the four screws at the rear of the
chassis that secure the power supply assembly.
5. Remove the power supply assembly from the chassis.
6. Ensure that the power supply assembly is the correct replacement. Some
power supply assemblies automatically sense the voltage, some power supply
Figure 15. Removing the retaining screws for the power supply assembly
24 User Guide