IBM Thinkpad T40 Hardware Maintenance Manual page 111

When installing: Apply thermal grease on the part
a
Figure 1. Fan assembly, short
Only in the case of Fan assembly, long, you need to peel
the plastic sheet b off on the thermal rubber before you
place it on the system board. Fan assembly, long M10
DOES NOT have the plastic sheet.
b
Figure 2. Fan assembly, long
Figure 3. Fan assembly, long M10
ThinkPad T40/T40p, T41/T41p, T42/T42p Series
marked a as in the following figures.
a
a
Removing and replacing a FRU
105