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10. Reinstall the system board shield. See “Removing and reinstalling the system board shield” on page 98.
11. Go to “Completing the parts replacement” on page 121.
Opening the system board shield window
Attention
Do not open your computer or attempt any repair before reading and understanding the “Important safety
information” in the ThinkCentre Edge Safety and Warranty Guide that came with your computer. To obtain a
copy of the ThinkCentre Edge Safety and Warranty Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to open and close the system board shield window.
To open and close the system board shield window, 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 other at 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 91.
4. Locate the system board shield window. See “FRU locations” on page 82.
5. Press the upper metal tab of the system board shield window, and then pivot the system board shield
window to open it.
Figure 33. Opening the system board shield window
6. To close the system board shield window, place the system board shield window on the system board
shield. Pivot the system board shield window until the two metal tabs align with each other, and then
press the upper metal tab to snap it into the position.
7. Go to “Removing the computer cover” on page 91.
Chapter 8. Replacing FRUs 107