Lenovo ThinkCentre M72e Hardware Maintenance Manual page 134

1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See "Removing the computer cover" on page 120.
3. Remove the front bezel. See "Removing and reinstalling the front bezel" on page 120.
4. Pivot the drive bay assembly upward. See "Accessing the system board components and drives" on
page 121.
5. Disconnect the signal cable and the power cable from the optical drive.
6. Hold the optical drive and remove the two screws that secure the optical drive.
Figure 69. Removing the optical drive screws
7. Press the drive bay assembly clip
Figure 70. Lowering the drive bay assembly
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inward and pivot the drive bay assembly downward as shown.