Lenovo ThinkPad P40 Yoga Hardware Maintenance Manual page 96

Loosen the screws in the alphabetical order as shown. Then remove the thermal fan assembly.
When you install the thermal fan assembly:
• Do not touch the thermal grease.
• Do not press, touch, or rotate the fan impeller.
• Do not touch the fan inlet hole.
• Do not twist or pull the cable of the thermal fan assembly.
• Do not apply pressure on the top and bottom covers of the thermal fan assembly.
• Do not press the heat pipe. Hold both sides of the heat pipe if you need to take the thermal fan assembly.
• Do not shake or drop the thermal fan assembly.
• Ensure that the fan connector is attached firmly.
• Ensure that the base cover assembly is attached firmly; otherwise, battery connection may fail.
• Always wear fingerstalls when handling the thermal fan assembly. Do not touch or hold any part of the
thermal fan assembly with bare fingers.
• Before you attach the thermal fan assembly to the computer, apply thermal grease, at an amount of
0.2 grams, on the part marked
application of grease can cause a thermal problem due to imperfect contact with a component. You
should peel the thin film off from the rubbers marked
For models with a discrete thermal pipes
90
ThinkPad P40 Yoga, S3, ThinkPad Yoga 14, and ThinkPad Yoga 460 Hardware Maintenance Manual
2a
2c
2d
2b
2g
a
as shown in the following illustrations. Either too much or too less
b
a
2e
3
2f
.