Lenovo ThinkCentre M53 Hardware Maintenance Manual page 136

3. With a tool (such as a screwdriver), carefully press the hook
clip 2 on the system board. Then, disengage the other hook on the heat sink from the corresponding
circle clip. Remove the heat sink from the chassis.
Figure 40. Removing the heat sink
4. Insert the hook 1 on the new heat sink into the circle clip
you used in step 3 to insert the other hook on the heat sink into the corresponding circle clip.
Figure 41. Installing the heat sink
What to do next:
• To work with another piece of hardware, go to the appropriate section.
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ThinkCentre M53 Hardware Maintenance Manual
1 to disengage the hook from the circle
2 on the system board. Then, use the tool