Front Chassis Fan - HP dc7900 - Convertible Minitower PC Service & Reference Manual

5. If using a new heatsink, remove the protective covering from the bottom of the heatsink and place
it in position atop the processor.
6. Secure the heatsink to the system board and system board tray with the 4 captive screws and
attach the heatsink control cable to the system board.
CAUTION:
X) to evenly seat the heatsink on the processor. This is especially important as the pins on the
socket are very fragile and any damage to them may require replacing the system board.
NOTE: After installing a new processor onto the system board, always update the system ROM to
ensure that the latest version of the BIOS is being used on the computer. The latest system BIOS can
be found on the Web at: http://h18000.www1.hp.com/support/files.

Front Chassis Fan

1. Prepare the computer for disassembly
2. Remove the computer access panel
3. Remove the heatsink
4. Disconnect the fan control cable from the system board.
5. Push down on the tab at the top of the fan (1).
6. Pull up on the fan (2), and then pull it toward the system board to remove it from the chassis.
Figure 7-51
To install the fan assembly, insert the fan tabs into the slots in the inner chassis wall and slide the fan
down until it clicks into place. Be sure to orient the air flow out of the unit. Refer to the air flow arrows
on the side of the fan housing for proper air flow orientation.
Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an
(Heatsink on page
Removing the front chassis fan
(Preparation for Disassembly on page
(Computer Access Panel on page
104).
63).
70).
Front Chassis Fan 107