Lenovo ThinkCentre E93z Hardware Maintenance Manual page 90

This section provides instructions on how to remove and reinstall the system board shield.
To remove and reinstall the system board shield, 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 flat 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 79.
4. Locate the system board shield in the computer. See "Locating major FRUs and CRUs" on page 70.
5. Remove the three screws that secure the system board shield. Slide the system board shield outward
slightly, and then lift the system board shield off the computer.
Figure 20. Removing the system board shield
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ThinkCentre E93z Hardware Maintenance Manual