HP NV517UT Maintenance & Service Guide: Compaq 500B and 505B Minitower Bus - Page 42

Heat sink assembly (Intel) — Model 500B

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Heat sink assembly (Intel) - Model 500B 1. Prepare the computer for disassembly (Preparation for Disassembly on page 3). 2. Remove the access panel (Access Panel on page 4). 3. Lay the computer on its side with the rear facing toward you. 4. Disconnect the heat sink fan control cable from the system board (1). 5. Remove the four torx screws (1) that secure the heat sink to the system board. Figure 2-46 Removing the heat sink 6. Lift the heat sink from the processor and set it on its side to keep from contaminating the work area with thermal grease. CAUTION: Heat sink retaining screws should be tightened in diagonally opposite pairs (as in an X) to evenly seat the heat sink to 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. When reinstalling an existing heat sink, 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. New heatsinks come from the factory with fresh thermal grease already applied. 34 Chapter 2 Removal and Replacement Procedures Microtower (MT) Chassis

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Heat sink assembly (Intel) — Model 500B
1.
Prepare the computer for disassembly (
Preparation for Disassembly
on page
3
).
2.
Remove the access panel (
Access Panel
on page
4
).
3.
Lay the computer on its side with the rear facing toward you.
4.
Disconnect the heat sink fan control cable from the system board
(1)
.
5.
Remove the four torx screws
(1)
that secure the heat sink to the system board.
Figure 2-46
Removing the heat sink
6.
Lift the heat sink from the processor and set it on its side to keep from contaminating the work area
with thermal grease.
CAUTION:
Heat sink retaining screws should be tightened in diagonally opposite pairs (as in an X) to
evenly seat the heat sink to 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.
When reinstalling an existing heat sink, 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. New heatsinks come from
the factory with fresh thermal grease already applied.
34
Chapter 2
Removal and Replacement Procedures Microtower (MT) Chassis