HP 240 Series, Maintenance And Service Manual

Page: 117 / 162

Fan/heat sink assembly
NOTE: The fan/heat sink assembly spare part kit includes replacement thermal materials.
Description Spare part number
Fan/heat sink assembly for use only with computer models equipped with an AMD processor 688281-001
Fan/heat sink assembly for use only with computer models equipped with an Intel processor and a
graphics subsystem with discrete video memory 685087-001
Fan/heat sink assembly for use only with computer models equipped with an Intel processor and a
graphics subsystem with UMA video memory 685086-001
NOTE: To properly ventilate the computer, allow at least 7.6 cm (3.0 in) of clearance on the left
side of the computer. The computer uses an electric fan for ventilation. The fan is controlled by a
temperature sensor and is designed to turn on automatically when high temperature conditions exist.
These conditions are affected by high external temperatures, system power consumption, power
management/battery conservation configurations, battery fast charging, and software requirements.
Exhaust air is displaced through the ventilation grill located on the left side of the computer.
Before removing the fan/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 battery (see Battery on page 56 ), and then remove the following components:
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WLAN module (see WLAN module on page 64 )
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Hard drive (see Hard drive on page 70 )
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Keyboard (see Keyboard on page 76 )
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Top cover (see Top cover on page 79 )
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Speakers (see Speakers on page 87 )
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USB board (see USB board on page 89 )
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Power connector cable (see Power connector cable on page 91 )
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Display assembly (see Display assembly on page 93 )
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System board (see System board on page 102 )
Component replacement procedures 109