HP Dx7500 Service Reference Guide: HP Compaq dx7500 Business PC - Page 139

Heatsink, area with thermal grease.

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Heatsink 1. Prepare the computer for disassembly (Preparation for Disassembly on page 91). 2. Remove the access panel (Access Panel on page 92). 3. Unplug the fan wire from the white system board connector labeled CPU FAN. 4. Loosen the four captive screws that secure the heatsink to the system board tray. CAUTION: Heatsink retaining screws should be removed in diagonally opposite pairs (as in an X) to even the downward forces 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. 5. Lift the heatsink from atop the processor and set it on its side to keep from contaminating the work area with thermal grease. When reinstalling the heatsink, make sure that its bottom has been cleaned with an alcohol wipe and fresh thermal grease has been applied to the top of the processor. CAUTION: Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an 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. Heatsink 129

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Heatsink
1.
Prepare the computer for disassembly (
Preparation for Disassembly
on page
91
).
2.
Remove the access panel (
Access Panel
on page
92
).
3.
Unplug the fan wire from the white system board connector labeled CPU FAN.
4.
Loosen the four captive screws that secure the heatsink to the system board tray.
CAUTION:
Heatsink retaining screws should be removed in diagonally opposite pairs (as in an
X) to even the downward forces 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.
5.
Lift the heatsink from atop the processor and set it on its side to keep from contaminating the work
area with thermal grease.
When reinstalling the heatsink, make sure that its bottom has been cleaned with an alcohol wipe and
fresh thermal grease has been applied to the top of the processor.
CAUTION:
Heatsink retaining screws should be tightened in diagonally opposite pairs (as in an 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.
Heatsink
129