HP Compaq nc8430 Maintenance And Service Manual page 114

Removal and Replacement Procedures
3. Disconnect the fan cable 1 from the system board.
✎
The following screws should be removed, then installed, in the
1, 2, 3, 4 sequence stamped on the fan assembly.
4. Loosen the two Phillips PM2.0×3.0 screws 2 and the
two Phillips PM2.5×7.0 screws 3 that secure the fan
assembly to the computer.
5. Remove the fan assembly 4.
✎
Due to the adhesive quality of the thermal paste located
between the video heat sink and video board, it may be
necessary to move the heat sink from side to side to detach the
heat sink from the video board.
Removing the Fan Assembly
5–24 Maintenance and Service Guide