Lenovo ThinkPad L412 Hardware Maintenance Manual page 99

Table 15. Removal steps of fan assembly (continued)
4
When installing: Before you attach the fan assembly to the computer, apply
thermal grease, at an amount of 0.2 grams, on the parts marked a as in the
following figures. Either too much or too less application of grease can cause a
thermal problem due to imperfect contact with a component. For the new CPU
thermal device/fan, you need to peel the thin film off from the rubbers marked
b .
For discrete fan assembly for ThinkPad SL410, L410, SL510, and L510:
b
b
a
b
a
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Removing and replacing a FRU