HP Dx2400 Service Reference Guide: HP Compaq dx2400 Business PC - Page 66

Heatsink

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Heatsink You will need a screwdriver with a narrow shaft to loosen the heatsink screws. 1. Prepare the computer for disassembly (Preparation for Disassembly on page 27). 2. Remove the computer access panel (Computer Access Panel on page 31). 3. Unplug the fan cable from the system board (CPU FAN). 4. Using a screwdriver with a narrow shaft, loosen the four silver T15 captive screws that secure the heatsink to the system board. NOTE: The screw closest to the side of the chassis may be difficult to access. You may need to remove the fan on top of the heatsink to gain access to this screw. To remove the fan, pull back on the four clips that secure the fan to the heatsink and loosen the fan from the clip. 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. Remove the heatsink from the processor. 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. 60 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis

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Heatsink
You will need a screwdriver with a narrow shaft to loosen the heatsink screws.
1.
Prepare the computer for disassembly (
Preparation for Disassembly
on page
27
).
2.
Remove the computer access panel (
Computer Access Panel
on page
31
).
3.
Unplug the fan cable from the system board (CPU FAN).
4.
Using a screwdriver with a narrow shaft, loosen the four silver T15 captive screws that secure the
heatsink to the system board.
NOTE:
The screw closest to the side of the chassis may be difficult to access. You may need to
remove the fan on top of the heatsink to gain access to this screw. To remove the fan, pull back
on the four clips that secure the fan to the heatsink and loosen the fan from the clip.
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.
Remove the heatsink from the processor.
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.
60
Chapter 6
Removal and Replacement Procedures Microtower (MT) Chassis