Replacing A Memory Module - Lenovo ThinkCentre M90 Hardware Maintenance Manual

Figure 6. Removing the front bezel
4. To reinstall the front bezel, align the plastic tabs on the bottom of the bezel with the corresponding holes
in the chassis, and then pivot the front bezel inward until it snaps into position.
5. Go to "Completing the parts replacement" on page 89.

Replacing a memory module

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 install or replace a memory module.
Your computer has two slots for installing or replacing DDR3 SODIMMs (small outline dual inline memory
modules) that provide up to a maximum of 4 GB system memory. When installing or replacing a memory
module, use 1 GB or 2 GB DDR3 SODIMMs in any combination up to a maximum of 4 GB.
To install or replace a memory module, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Open the computer cover. See "Opening the computer cover" on page 70.
3. Locate the memory slots. See "Locating parts on the system board" on page 69.
4. Open the retaining clips. If you are replacing an old memory module, open the retaining clips and
remove the memory module being replaced as shown.
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ThinkCentre Hardware Maintenance Manual