HP EliteBook 8440W Maintenance And Service Manual page 81

Remove the heat sink:
1. Following the 1, 2, 3, 4 sequence stamped into the heat sink, loosen the 4 Phillips PM2.5×10.0 spring-loaded
captive screws 1 that secure the heat sink to the system board.
2. Pull the heat sink up 2 and away 3 from the ventilation grill. If necessary, move the heat sink side-to-side to
release the heat sink from the thermal material.
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The first illustration below shows the heat sink on computer models that use the discrete graphics subsystem. The
second illustration shows the heat sink on computer models that use the UMA graphics subsystem.
3. Remove the heat sink assembly.
Maintenance and Service Guide
Removal and replacement procedures
4–37