System Board - HP dc7900 - Convertible Minitower PC Service & Reference Manual

4. Position the heatsink atop the processor.
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.

System Board

CAUTION:
1. Prepare the computer for disassembly
2. Remove the computer access panel
3. Remove the optical drive
4. Remove the memory modules
5. Remove the hard drive
6. Remove the hard drive cage
7. Remove the front I/O panel cage:
a. Remove the screw from the left side of the cage that holds the I/O panel cage in place (1).
b. Press the tab on left side of the cage (2), and then swing the cage toward right to remove it
from the chassis.
NOTE:
the tab while pressing the tab.
Figure 9-35
8. Remove the heatsink
9. Disconnect all cables connected to the system board, noting their location for reinstallation.
206 Chapter 9 Removal and Replacement Procedures Ultra-Slim Desktop (USDT) Chassis
Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an
Be very careful when removing or replacing the system board to prevent damaging it.
(Removing the Existing Optical Drive on page
(Hard Drive on page
(Hard Drive Cage on page
If the cage sticks and will not come loose, press down on the top of the panel near
Removing the I/O panel cage
(Heatsink on page
(Preparation for Disassembly on page
(Computer Access Panel on page
(Installing Additional Memory on page
195).
204).
178).
183).
191).
186).
199).