HP EliteBook 800 EliteBook 820 G4 Notebook PC EliteBook 828 G4 Notebook PC Mai - Page 66

Heat sink/fan assembly, system board

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Heat sink/fan assembly NOTE: The heat sink/fan assembly spare part kit includes replacement thermal material. Description Heat sink/thermal module with fans Spare part number 821691-001 Before removing the heat sink/fan assembly, follow these steps: 1. Turn off 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 the power from the computer by unplugging the power cord from the computer. 3. Disconnect all external devices from the computer. 4. Remove the bottom cover (see Bottom cover on page 30). 5. Remove the battery (see Battery on page 35). Remove the heat sink/fan assembly: ▲ Disconnect the fan cable (1), loosen the six captive screws on the fan and heat sink following the sequence stamped on the fan and heat sink (2), and then remove the heat sink/fan assembly from the system board (3). CAUTION: Take extreme care when removing the heat sink and fan assembly. The heatpipe is very fragile and can be easily damaged and bent during removal. NOTE: The thermal material must be thoroughly cleaned from the surfaces of the heat sink and the system board components each time the heat sink is removed. Replacement thermal material is included with the heat sink, processor, and system board spare part kits. 56 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts

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Heat sink/fan assembly
NOTE:
The heat sink/fan assembly spare part kit includes replacement thermal material.
Description
Spare part number
Heat sink/thermal module with fans
821691-001
Before removing the heat sink/fan assembly, follow these steps:
1.
Turn
off
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 the power from the computer by unplugging the power cord from the computer.
3.
Disconnect all external devices from the computer.
4.
Remove the bottom cover (see
Bottom cover
on page
30
).
5.
Remove the battery (see
Battery
on page
35
).
Remove the heat sink/fan assembly:
▲
Disconnect the fan cable
(1)
, loosen the six captive screws on the fan and heat sink following the
sequence stamped on the fan and heat sink
(2)
, and then remove the heat sink/fan assembly from the
system board
(3)
.
CAUTION:
Take extreme care when removing the heat sink and fan assembly. The heatpipe is very
fragile and can be easily damaged and bent during removal.
NOTE:
The thermal material must be thoroughly cleaned from the surfaces of the heat sink and the
system board components each time the heat sink is removed. Replacement thermal material is
included with the heat sink, processor, and system board spare part kits.
56
Chapter 6
Removal and replacement procedures for Authorized Service Provider parts