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2. Remove the fan/heat sink (2).
NOTE: The thermal material must be thoroughly cleaned from the surfaces of the fan/heat sink and
system board components. Thermal grease is used on the video chip (1) and the surface of the fan/
heat sink (1) that contacts the video chip. Thermal tape is used on the processor (2) and the surface
of the fan/heat sink (2) that contacts the processor. Replacement thermal material is included with
all fan/heat sink and system board spare part kits.
Reverse this procedure to install the fan/heat sink.
NOTE: To properly ventilate the computer, allow at least a 7.6-cm (3-inch) 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
50 Chapter 4 Removal and replacement procedures