Lenovo ThinkCentre M82 Hardware Maintenance Manual page 269

3. Position the computer cover on the chassis and then push the cover to the rear of the computer until
it snaps into position.
Figure 228. Installing the computer cover
263
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Chapter 11 Replacing FRUs (machine types: 2119, 2121, 3229, 3234, 3235, 3236, 3237, 3238, 3240, 3242, and 3243)