HP xw3400 HP xw3400 Workstation - Service and Technical Reference Guide - Page 96

Heatsink

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Heatsink 1. Prepare the workstation for disassembly (Preparation for disassembly on page 59). 2. Remove the access panel and rotate the workstation so the system board is parallel to the table to make it easier to work on (Access panel on page 61). 3. Disconnect the heatsink fan cable from the system board. 4. Loosen the four captive screws (1) that secure the heatsink to the system board. 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 (2) 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. 86 Chapter 7 Removal and replacement procedures ENWW

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Heatsink
1
.
Prepare the workstation for disassembly (
Preparation for disassembly
on page
59
).
2
.
Remove the access panel and rotate the workstation so the system board is parallel to the table to
make it easier to work on (
Access panel
on page
61
).
3
.
Disconnect the heatsink fan cable from the system board.
4
.
Loosen the four captive screws (1) that secure the heatsink to the system board.
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 (2) 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.
86
Chapter
7
Removal and replacement procedures
ENWW