Lenovo ThinkCentre Hardware Maintenance Manual page 88

Figure 22. Removing the fan duct
6. Follow this sequence to remove the four screws that secure the heat sink 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.
Figure 23. Removing the heat sink
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ThinkCentre Hardware Maintenance Manual
1 , then fully remove screw
3 , then fully remove screw
2 , and then fully remove screw
4 , and then fully remove screw
1 .
3 .