Lenovo 3980 Computer Hardware User Manual


 
1. Remove any media from the drives. Then, turn off all attached devices and the computer.
2. Disconnect all power cords from electrical outlets.
3. Disconnect the 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 secures the computer cover.
5. Push the cover-release button on the side of the computer and pivot the computer cover outward.
Figure5. Removing the computer cover
6. Note the locations of all parts and connectors on the system board. See “Locating parts on the
system board” on page 67.
7. Disconnect all the cables from the system board and completely remove the computer cover.
Removing and reinstalling the front bezel
Attention
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre
Safety and Warranty Guide, go to:http://www.lenovo.com/support
This section provides instructions on how to remove and reinstall the front bezel.
To remove and reinstall the front bezel, do the following:
1. Remove the computer cover. See “Removing the computer cover” on page 68.
2. Remove the front bezel by releasing the two plastic tabs and pivoting the front bezel forward to
completely remove it from the computer.
Chapter 8. Replacing FRUs 69