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Fan/heat sink assembly
NOTE: The fan/heat sink assembly spare part kit includes replacement thermal material.
Description Spare part number
For use only with Intel Core i7, 45-W processors 608650-001
For use only with Intel Core i5, 35-W processors 603799-001
NOTE: To properly ventilate the computer, allow at least 7.6 cm (3 in) of 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 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 37), and then remove the following components:
a. Hard drives (see
Primary hard drive on page 38 and see Secondary hard drive on page 44)
b. memory module compartment cover (see
Memory module on page 42)
c. Keyboard (see
Keyboard on page 50)
d.
Top cover (see
Top cover on page 52)
e. Optical drive (see
Optical drive on page 57)
f. System board (see
System board on page 60)
Remove the fan/heat sink assembly:
1. Turn the system board upside down with the front toward you.
2. Disconnect the fan cable (1) from the system board.
3. Loosen the seven captive screws (2) that secure the fan/heat sink assembly to the system board.
NOTE: Due to the adhesive quality of the thermal material located between the fan/heat sink
assembly and system board components, it may be necessary to move the fan/heat sink assembly
from side to side to detach it.
64 Chapter 4 Removal and replacement procedures ENWW