Lenovo ThinkCentre M900z 10F2, Hardware Maintenance Manual, Page: 99 / 146

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 computer cover is facing up.
4. Remove the computer stand. See “Replacing the computer stand” on page 88.
5. Slide the back cover as shown to remove it from the chassis.
Figure 20. Removing the back cover
Replacing the memory module shield
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 “Read this first: Important safety information” on page 1.
To replace the memory module shield, do the following:
1. Remove any media from the drives and turn off all connected 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 back cover. See “Removing the back cover” on page 90.
3. Locate the memory module shield. See “Computer components” on page 31.
4. Pull the tab 1 on the memory module shield as shown to remove it from the chassis.
Figure 21. Removing the memory module shield
Chapter 9
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Installing or replacing hardware
91