Fan/heat sink assembly
Description
Spare part number
Fan/heat sink assembly (includes thermal paste and thermal pads)
431450-001
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 applications.
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 cord.
4
.
Remove the battery (see
Battery on page 29
).
5
.
Remove the following components:
a
.
Hard drive (see
Hard drive on page 30
)
b
.
Memory module compartment cover (see
Memory module on page 32
)
c
.
Optical drive (see
Optical drive on page 36
)
d
.
Switch cover (see
Switch cover on page 38
)
e
.
Keyboard (see
Keyboard on page 40
)
f
.
Display assembly (see
Display assembly on page 44
)
g
.
Top cover (see
Top cover on page 49
)
h
.
System board (see
System board on page 55
)
Remove the fan/heat sink assembly:
1
.
Turn the system board upside down, with the external monitor port toward you.
2
.
Disconnect the fan cable
(1)
from the system board.
3
.
Loosen the five Phillips PM2.5×5.0 screws
(2)
that secure the fan/heat sink assembly to the system
board.
58 Chapter
4
Removal and replacement procedures
