Acer Veriton M4618G Service Manual page 38

Lift the heat sink fan assembly away from the mainboard.
3.
Remove the heat sink fan assembly then lay it down in an upright position—with the thermal patch facing
4.
upward. Do not let the thermal patch on the heat sink fan assembly touch the work surface.
Use an alcohol pad to wipe off the thermal grease from both the heat sink and the processor.
5.
30 Chapter 3