Lenovo ThinkCentre M83, Hardware Maintenance Manual

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1. After you have removed the microprocessor from the failing system board, close the microprocessor
retainer and then put the lever to the locked position to secure the retainer in place.
2. Note the orientation of the socket cover, and install one side of the socket cover into the microprocessor
socket. Carefully press the other side of the socket cover downward until the socket cover snaps
into position.
Note: Your microprocessor socket and cover might look slightly different from the illustration.
Figure 164. Installing the microprocessor socket cover
3. Carefully check the four corners of the socket cover to ensure that the cover is secured.
4. Follow any additional instructions that are included with the replacement part you received.
What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the installation or replacement, go to “Completing the parts replacement” on page 234.
Replacing the cover presence switch
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 “Safety information” on page 1.
This section provides instructions on how to replace the cover presence switch, which is also known as
intrusion switch.
To replace the cover presence switch, 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 159.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 160
4. Locate the cover presence switch. See “Locating major FRUs and CRUs” on page 80.
5. Disconnect the cover presence switch cable from the cover presence switch connectors on the system
board.
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ThinkCentre M83 and M93/p Hardware Maintenance Manual