Lenovo ThinkCentre M55e Hardware Maintenance Manual - Page 89
Opening, cover
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Opening the cover Important Turn off the computer and wait 3 to 5 minutes to let the computer cool before opening the computer cover. To open the computer cover, do the following: 1. Remove any media (diskettes, CDs, or tapes) from the drives, shut down your operating system, turn off all attached devices and the computer. 2. Unplug all power cords from electrical outlets. 3. Disconnect the cables attached to the computer. This includes power cords, input/output (I/O) cables, and any other cables that are connected to the computer. 4. Remove any locking devices, such as a cable lock that secure the computer cover. 5. Press the buttons on the sides of the computer and pivot the cover upward to open the computer as shown. Chapter 8. Replacing FRUs 83