Lenovo 28155YU, 28155XU, 2808DKU manual When installing, Step, Screw quantity, Color, Torque

Table 26. Removal steps of system board, fan assembly, and 34-mm ExpressCard slot frame (continued)

When installing:

vBefore you attach the fan assembly to the computer, apply thermal grease, at

an amount of 0.2 grams, on the part marked 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. You need to peel the thin film off

from the rubber .

a

vMake sure that the fan connector is attached firmly.

Step	Screw (quantity)		Color	Torque
	M2	⋅ 3 mm, small−head, nylon-coated (1)	Silver	0.167 Nm
				(1.7 kgfcm)
	M2	⋅ 5 mm, flat−head, nylon-coated (2)	Black	0.167 Nm
				(1.7 kgfcm)

Removing and replacing a FRU 121