Toshiba PORTEGE M780 Maintenance Manual page 366

4.20 Fan/Heat sink/CPU
4. When silicon grease is already applied to the CPU or fin, wipe them off with a cloth
in advance.
5. Apply new grease (Shin-Etsu Chemical Co. X-23-7921-5) on the CPU using a special
syringe as shown in the following figure. Apply quarter of scale (0.25ml) of grease
evenly on the CPU chip.
6. Place the fan on the heat sink and secure them with the following screws.
7. Set the fan hood in place.
CAUTION: Do not apply silicon grease on the North bridge.
8. Place the heat sink on the CPU and secure it with the following screws.
9. Connect the fan cable to the connector CN3380 on the system board.
CAUTION: Do not put the fan cable on the fan.
PORTÉGÉ M780 Maintenance Manual (960-809)
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Grease
Figure 4-35 Applying new grease
 M2.54.0B
FLAT HEAD screw
 M2.04.0B
BIND screw
Tighten the screws in the order of the number marked on the CPU hold plate.
4 Replacement Procedures
CPU
2
4
[CONFIDENTIAL] 4-57