10. Allow the heatsink to cool.
11. Remove the heatsink:
a. Loosen one pair of diagonally opposite screws halfway, then loosen the other pair of screws (callouts 1 and 2).
b. Completely loosen all screws in the same sequence.
c. Remove the heatsink from the processor backplate (callout 3).
12. Using a cleaning solvent, such as alcohol wipes, remove the existing thermal grease from the processor.
Allow the alcohol to evaporate before continuing.
Removing the heatsink
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