HP mt20 Maintenance and Service Guide - Page 68

Heat sink assembly

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Heat sink assembly All heat sink assembly spare part kits include replacement thermal material. Description Heat sink assembly (UMA) Spare part number 910980-001 Before removing the heat sink assembly, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system. 2. Disconnect all external devices connected to the computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet, and then unplugging the AC adapter from the computer. 4. Remove the following components: a. Service door (see Service door on page 26). b. WLAN module (see WLAN/Bluetooth combo card on page 29) c. Keyboard (see Keyboard on page 32) d. Top cover (see Top cover on page 39) e. USB/audio board (see USB/audio board on page 49) f. Battery (see Battery on page 50) g. Fan (see Fan on page 52) h. System board (see System board on page 54) Remove the heat sink assembly: 1. Position the system board upside-down. 2. In the order indicated on the heat sink, loosen the 4 captive Phillips screws (1)-(4) that secure the heat sink to the system board. 58 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts

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Heat sink assembly
All heat sink assembly spare part kits include replacement thermal material.
Description
Spare part number
Heat sink assembly (UMA)
910980-001
Before removing the heat sink assembly, follow these steps:
1.
Shut down the computer. If you are unsure whether the computer is
off
or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2.
Disconnect all external devices connected to the computer.
3.
Disconnect the power from the computer by
first
unplugging the power cord from the AC outlet, and
then unplugging the AC adapter from the computer.
4.
Remove the following components:
a.
Service door (see
Service door
on page
26
).
b.
WLAN module (see
WLAN/Bluetooth combo card
on page
29
)
c.
Keyboard (see
Keyboard
on page
32
)
d.
Top cover (see
Top cover
on page
39
)
e.
USB/audio board (see
USB/audio board
on page
49
)
f.
Battery (see
Battery
on page
50
)
g.
Fan (see
Fan
on page
52
)
h.
System board (see
System board
on page
54
)
Remove the heat sink assembly:
1.
Position the system board upside-down.
2.
In the order indicated on the heat sink, loosen the 4 captive Phillips screws
(1)
–
(4)
that secure the heat
sink to the system board.
58
Chapter 6
Removal and replacement procedures for Authorized Service Provider parts