IBM ThinkPad G40 Hardware Maintenance Manual page 98

Removing and replacing a FRU
When installing: Apply 1 gram (approx.) of thermal
Caution: When installing, be sure the screw that was
moved from position 2 to 3 above, is
returned to its original location.
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ThinkPad G40, G41
grease to the underside of the fan
assembly, spreading it evenly with the
provided spatula. Do not apply thermal
grease directly to the CPU. Then, when
the fan is in place, tighten the screws in
this order: A ; B ; and C .