Removing The Power Supply Assembly - Lenovo ThinkCentre Hardware Maintenance Manual

Hazardous voltage, current, and energy levels are present inside any component that has this label attached.
There are no servicable parts inside these components.
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, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the power supply assembly.

Removing the power supply assembly

To remove the power supply assembly, do the following:
1. Turn off the computer.
2. Disconnect all cables, power cords, and external options from your computer. See "Rear connectors"
on page 65.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
4. Remove the computer cover. See "Removing the computer cover" on page 70.
5. Disconnect the power supply assembly connector from the system board. See "System board
connectors" on page 68.
6. Remove the rear I/O assembly. See "Removing the rear I/O assembly" on page 92.
7. Remove the power connector bracket by removing the five screws
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that secure it to the main bracket.