Lenovo T420 - Manual (Page 105)

For Integreted Graphics models:
2
3
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 fan in the integrated
graphics models, you need to peel the thin film off from the thermal rubber marked
b .
For Discrete Graphics models:
b a
For Integrated Graphics models:
Chapter 8 . Removing and replacing a FRU 99