Lenovo M5800 Desktop - Manual (Page 89)

CAUTION:
The heat sink and microprocessor might be very hot. Turn off the computer and wait three to five
minutes to let the computer cool before removing the computer cover.
To replace the microprocessor, 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 69.
3. Lay the computer on its side for easier access to the system board.
4. Locate the system board and disconnect all cables connected to the system board. See “Locating
parts on the system board” on page 65.
5. Remove the heat sink and fan assembly. See “Replacing the heat sink and fan assembly” on page 79.
Note: Place the heat sink and fan assembly on its side so that the thermal grease on the bottom of it
does not get in contact with anything.
6. Lift the small handle 1 to release the microprocessor 2 secured on the system board.
Figure 21. Accessing the microprocessor
7. Lift the microprocessor straight up and out of the microprocessor socket.
Chapter 8 . Replacing FRUs 83