Replacing The Power Supply - Lenovo ThinkCentre Hardware Maintenance Manual

Replacing the power supply

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.
To replace the power supply, do the following:
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. 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.
3. Remove the computer cover. See "Removing the computer cover" on page 69.
4. Disconnect the power supply cable from the system board. See "FRU locations" on page 67.
5. Remove the hard disk drive. See "Replacing the hard disk drive" on page 78.
6. Remove the rear I/O assembly cover. See "Removing or reinstalling the rear I/O assembly cover"
on page 72.
7. Remove the four screws
secure the power cord connector bracket. Note the routing of the power cord connector cable
the power supply up to remove it from the computer main bracket.
Figure 37. Removing the power supply
8. Remove the two screws
the power cord connector and then remove the power cord connector from the power cord connector
bracket.
9. Install the two screws to secure the new power cord connector to the power cord connector bracket.
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ThinkCentre Hardware Maintenance Manual
1
that secure the power supply and then remove the two screws
4 (as shown in Removing the power supplyFigure 37 on page 98) that secure
2
that
3
. Lift