Lenovo ThinkCentre M80 Hardware Maintenance Manual page 82

To remove and reinstall the front bezel, 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. Remove the computer cover. See "Removing the computer cover" on page 72.
3. Remove the front bezel by releasing the three plastic tabs on the left side and pivoting the front bezel
outward.
Figure 7. Removing the front bezel
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ThinkCentre Hardware Maintenance Manual