HP EliteBook 700 Maintenance and Service Guide - Page 63

Heat sink/fan assembly

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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 first unscrewing the power cord from the AC outlet, and then unscrewing the AC adapter from the computer. 3. Disconnect all external devices from the computer. 4. Bottom cover (see Bottom cover on page 33). 5. Remove the battery (see Battery on page 36). 6. Remove the system board (see System board on page 49). 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 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 heatpipes between the fans are 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. Component replacement procedures 53

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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
first
unscrewing the power cord from the AC outlet, and
then unscrewing the AC adapter from the computer.
3.
Disconnect all external devices from the computer.
4.
Bottom cover (see
Bottom cover
on page
33
).
5.
Remove the battery (see
Battery
on page
36
).
6.
Remove the system board (see
System board
on page
49
).
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 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 heatpipes between
the fans are 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.
Component replacement procedures
53