Fan and heat sink
Description Spare part number
Heat sink (includes thermal material)
●
For use in models with UMA graphics subsystems
486838-001
●
For use in models with discrete graphics subsystem models (includes fan)
492262-001
Fan (includes thermal material) 486844-001
NOTE: To properly ventilate the computer, allow at least a 7.6-cm (3-inch) clearance on the right side
and rear panel 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 and heat sink assemblies, 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 55).
5. Remove the following components:
a. Hard drive (see
Hard drive on page 59)
b. Optical drive (see
Optical drive on page 57)
c. Keyboard (see
Keyboard on page 72)
d. Keyboard cover (see
Keyboard cover on page 76)
e. Display assembly (see
Display assembly on page 83)
f. Top cover (see
Top cover on page 95)
g. System board (see
System board on page 110)
Remove the fan:
1. Turn the system board upside down with the front toward you.
2. Remove the two Phillips PM2.5×4.0 screws (1) securing the fan to the system board.
Component replacement procedures 117
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