Note: Loosen the screws , but do not remove them.
Attention: Do not handle the fan roughly. Improper handling of the fan can cause distortion or deformation and imperfect contact with components. 74 ThinkPad
Installation of the fan assembly
Before you attach the fan assembly to the computer, apply thermal grease, at an amount of 0.2 grams, on the part marked [a] as in the following figure. Either too much or too less application of grease can cause a thermal problem due to imperfect contact with a component. For the new fan assembly, you need to peel the thin film off from the rubber [b].
Make sure that the fan connector is attached firmly.