Lenovo ThinkCentre M600 Hardware Maintenance Manual page 96

CAUTION:
The heat sink 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, do the following:
1. Remove any media from the drives and turn off all connected 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 87.
3. Loosen the four screws that secure the heat sink to the system board in the following sequence:
a. Partially remove screw
b. Partially remove screw
Note: Carefully remove the four screws
the system board. The four screws cannot be removed from the heat sink.
Figure 21. Removing the heat sink
4. Lift the failing heat sink off the system board.
Notes:
• You might have to gently twist the heat sink to free it from the microprocessor.
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ThinkCentre M600 Hardware Maintenance Manual
1 2
, fully remove screw
3 , fully remove screw 4
1 to 4 from the system board to avoid any possible damage to
, and then fully remove screw
, and then fully remove screw
1
.
3 .