Replacing The Heat Sink And Fan Assembly - Lenovo ThinkCentre M73 10B0 Hardware Maintenance Manual

Replacing the heat sink and fan assembly

Attention: Do not open your computer or attempt any repair before reading and understanding the
"Important safety information" on page 1.
This section provides instructions on how to replace the heat sink and fan assembly.
CAUTION:
The heat sink and fan assembly might be very hot. Before you open the computer cover, turn off the
computer and wait several minutes until the computer is cool.
To replace the heat sink and fan assembly, 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 90.
3. Lay the computer on its side for easier access to the system board.
4. Locate the heat sink and fan assembly. See "Locating parts on the system board" on page 73.
5. Disconnect the heat sink and fan assembly cable from the microprocessor fan connector on the system
board. See "Locating parts on the system board" on page 73.
6. Follow this sequence to remove the four screws that secure the heat sink and fan assembly to the
system board:
a. Partially remove screw
b. Partially remove screw
Note: Carefully remove the four screws from the system board to avoid any possible damage to the
system board. The four screws cannot be removed from the heat sink and fan assembly.
Figure 33. Removing the heat sink and fan assembly
1 , then fully remove screw
3
, then fully remove screw
.
Chapter 9 Replacing FRUs (machine types: 10B0, 10B1, 10B2, 10B3, 10HJ, and 10HK)
2 , and then fully remove screw
4
, and then fully remove screw
1 .
3
.
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