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Fan/heat sink assembly
Description Spare part number
Fan/heat sink assembly for computer models with Intel processors equipped with a UMA graphics
subsystem (includes thermal material)
448625-001
Fan/heat sink assembly for use only with computer models with Intel processors equipped with a
WWAN module (includes thermal material)
450096-001
Fan/heat sink assembly for use only with computer models with AMD processors (includes thermal
material)
455843-001
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/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).
5.
Remove the following components:
a.
Hard drive (see
Hard drive on page 61)
b.
Optical drive (see
Optical drive on page 73)
c.
Keyboard (see
Keyboard on page 74)
d.
Switch cover (see
Switch cover on page 79)
e.
Display assembly (see
Display assembly on page 82)
f.
Top cover (see
Top cover on page 87)
g.
System board (see
System board on page 106)
Remove the fan/heat sink assembly:
1.
Turn the system board upside down with the front toward you.
112 Chapter 4 Removal and replacement procedures