HP EliteDesk 800 95W G4 Maintenance and Service Guide - Page 43

Heat sink, W models

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Heat sink CAUTION: The bond between the heat sink and the processor may be very tight. If the computer will power on, before removing the heat sink, turn on the computer until it warms the heat sink. Warming the fan sink lessens the bond between the heat sink and the processor, thereby making separating them easier. Make sure not to pull the processor out of the socket when you lift the heat sink, especially if you cannot warm the fan sink prior to removal. Inadvertently removing the processor can damage the pins. The heat sink is secured with three captive Torx screws. 1. Prepare the computer for disassembly (Preparation for disassembly on page 15). 2. Remove the access panel (Access panel on page 16). 3. Remove the fan (Fan on page 34). 4. 35 W models: In the order indicated on the heat sink, loosen the three captive Torx screws (1) that secure the heat sink to the computer. Lift the heat sink about 30 degrees (2), and then pull heat sink toward front to the chassis to remove it (3). CAUTION: Be sure the loosen the screws in the order indicated by the numbers stamped on the heat sink to avoid damaging the processor. CAUTION: To reduce a degradation in thermal performance, be sure not to touch the thermal grease on the surface of the processor or the heat sink. Heat sink 35

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Heat sink
CAUTION:
The bond between the heat sink and the processor may be very tight.
If the computer will power on, before removing the heat sink, turn on the computer until it warms the heat
sink. Warming the fan sink lessens the bond between the heat sink and the processor, thereby making
separating them easier.
Make sure not to pull the processor out of the socket when you lift the heat sink, especially if you cannot
warm the fan sink prior to removal. Inadvertently removing the processor can damage the pins.
The heat sink is secured with three captive Torx screws.
1.
Prepare the computer for disassembly (
Preparation for disassembly
on page
15
).
2.
Remove the access panel (
Access panel
on page
16
).
3.
Remove the fan (
Fan
on page
34
).
4.
35 W models:
In the order indicated on the heat sink, loosen the three captive Torx screws
(1)
that
secure the heat sink to the computer. Lift the heat sink about 30 degrees
(2)
, and then pull heat sink
toward front to the chassis to remove it
(3)
.
CAUTION:
Be sure the loosen the screws in the order indicated by the numbers stamped on the heat
sink to avoid damaging the processor.
CAUTION:
To reduce a degradation in thermal performance, be sure not to touch the thermal grease
on the surface of the processor or the heat sink.
Heat sink
35