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Fan and heat sink assembly
Description Spare part number
Fan and heat sink assembly (includes replacement thermal material) 577924-001
NOTE: To properly ventilate the device, allow at least a 7.6-cm (3-inch) clearance on the left side of
the device. The device 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 device.
Before removing the fan and heat sink assembly, follow these steps:
1. Shut down the device. If you are unsure whether the device is off or in Hibernation, turn the device
on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the device.
3. Disconnect the power from the device by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the device.
4. Remove the battery (see
Battery on page 32).
5. If your device has WWAN capability, remove the SIM (see
SIM on page 33).
6. Remove the following components:
a. Keyboard (see
Keyboard on page 36)
b. Hard drive (see
Hard drive on page 39)
c. Top cover (see
Top cover on page 44)
d. Display assembly (see
Display assembly on page 52)
e. System board (see
System board on page 59)
Component replacement procedures 63