Acer Altos G540 M2 - Manual (Page 82)

3 System upgrade 72
(3) Engage the load lever back into place.
9 Apply the thermal interface material.
(1) Use an alcohol pad to wipe off the old thermal grease from
both the HSF assembly and the processor socket retention
plate.
(2) Apply a thin layer of an Acer-approved thermal interface
material before installing the HSF.
Make sure that only a very thin layer is applied so that both
contact surfaces are still visible.
10 Reinstall the HSF assembly.
(1) Align then insert the HSF on top of the retention plate.