Replacing The Power Supply Assembly - Lenovo ThinkCentre M90 Hardware Maintenance Manual

Figure 8. Removing a memory module
6. Position the new memory module over the memory slot. Make sure that the notch
module aligns correctly with the slot key
down into the slot until the retaining clips close.
Figure 9. Installing a memory module
7. Reinstall the PCI Express x16 graphics card if you have removed it.
8. Go to "Completing the parts replacement" on page 98.

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, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the power supply assembly.
To replace the power supply assembly, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See "Removing the computer cover" on page 68.
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ThinkCentre Hardware Maintenance Manual
2 on the system board. Push the memory module straight
1 on the memory