HP Pro Mini 400 G9 Desktop PC Maintenance and Service Guide - Page 43

Processor heat sink

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3. Pull the speaker into the computer to remove it (3). To install the speaker, reverse the removal procedures. Processor heat sink To remove the processor heat sink, use these procedures. Models with a graphics card and heat sink do not include a separate processor heat sink. IMPORTANT: The bond between the heat sink and the processor can be very tight. If the computer will turn on, before removing the heat sink, turn on the computer until it warms the heat sink. Warming the heat sink loosens the bond between the heat sink and the processor, thereby making it easier to separate them. Do not pull the processor out of the socket when you lift the heat sink, especially if you cannot warm the heat sink before removal. Inadvertently removing the processor can damage the pins. Before removing the processor heat sink, follow these steps: 1. Prepare the computer for disassembly (see Preparation for disassembly on page 20). 2. Remove the access panel (see Access panel on page 20). 3. Remove the fan (see Fan on page 26). Remove the processor heat sink: 1. In the order indicated on the heat sink, loosen the three captive Torx screws (1). 2. Lift the back of the heat sink upward, and then remove the heat sink from the computer (2). IMPORTANT: Be sure to loosen the screws in the order indicated by the numbers stamped on the heat sink. IMPORTANT: For optimum thermal performance, be sure not to touch the thermal grease on the surface of the processor or the heat sink. 36 Chapter 4 Removal and replacement procedures

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3.
Pull the speaker into the computer to remove it
(3)
.
To install the speaker, reverse the removal procedures.
Processor heat sink
To remove the processor heat sink, use these procedures. Models with a graphics card and heat sink do not
include a separate processor heat sink.
IMPORTANT:
The bond between the heat sink and the processor can be very tight.
If the computer will turn on, before removing the heat sink, turn on the computer until it warms the heat
sink. Warming the heat sink loosens the bond between the heat sink and the processor, thereby making it
easier to separate them.
Do not pull the processor out of the socket when you lift the heat sink, especially if you cannot warm the
heat sink before removal. Inadvertently removing the processor can damage the pins.
Before removing the processor heat sink, follow these steps:
1.
Prepare the computer for disassembly (see
Preparation for disassembly
on page
20
).
2.
Remove the access panel (see
Access panel
on page
20
).
3.
Remove the fan (see
Fan
on page
26
).
Remove the processor heat sink:
1.
In the order indicated on the heat sink, loosen the three captive Torx screws
(1)
.
2.
Lift the back of the heat sink upward, and then remove the heat sink from the computer
(2)
.
IMPORTANT:
Be sure to loosen the screws in the order indicated by the numbers stamped on the heat
sink.
IMPORTANT:
For optimum thermal performance, be sure not to touch the thermal grease on the
surface of the processor or the heat sink.
36
Chapter 4
Removal and replacement procedures