Heatsink - HP dc7900 - Convertible Minitower PC Service & Reference Manual

Heatsink

1. Prepare the computer for disassembly
2. Remove the computer access panel
3. Remove the front fan
4. Lift the fan up and place it on top of the optical drive to access the front bezel release tabs. You
do not need to disconnect the fan cable from the system board.
5. Unscrew the four screws that secure the heatsink to the system board, and then lift the heatsink
from the system board.
Figure 9-33
CAUTION:
X) to even the downward forces on the processor to avoid damage that could require replacing the
system board.
6. Lay the heatsink on its top in a safe area to prevent the thermal grease from contaminating the
work surface.
If reusing the existing heatsink go to step 1.
If using a new heatsink, go to step 3.
1. If reusing the existing heatsink, clean bottom of the heatsink and apply the thermal grease provided
in the spares kit to the top of the processor.
2. Position the heatsink atop the processor.
3. If using a new heatsink, remove the protective covering from the bottom of the heatsink and place
it in position atop the processor.
4. Secure the heatsink to the system board and system board tray with the 4 captive screws and
attach the heatsink control cable and the thermal sensor cable to the system board.
204 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis
(Front Fan on page
Removing the heatsink
Heatsink retaining screws should be removed in diagonally opposite pairs (as in an
(Preparation for Disassembly on page
(Computer Access Panel on page
201).
178).
183).