Video board fan
Description
Spare part number
Video board fan
448163-001
NOTE:
To properly ventilate the computer, allow at least a 7.6-cm (3-inch) clearance on the left and
right sides and rear panel of the computer. The computer uses two electric fans for ventilation. The fans
are controlled by a temperature sensor and are 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 grills located on the computer rear panel.
Before removing the video board fan, 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 36
).
5
.
Remove the following components:
a
.
Hard drive (see
Hard drive on page 42
)
b
.
Optical drive (see
Optical drive on page 49
)
c
.
Keyboard (see
Keyboard on page 50
)
d
.
Hinge cover (see
Hinge cover on page 52
)
e
.
Rear cover (see
Rear cover on page 53
)
f
.
Top cover (see
Top cover on page 55
)
g
.
Subwoofer (see
Subwoofer on page 67
)
h
.
System board (see
System board on page 70
)
i
.
Video board heat sink (see
Video board heat sink on page 79
)
Remove the video board fan:
1
.
Turn the video heat sink upside down.
2
.
Remove the three black Phillips PM2.0×4.0 screws
(1)
that secure the video board fan to the video
board heat sink.
Component replacement procedures 81