HP CQ42-173TX Fan/heat sink assembly, Subsystem memory includes thermal replacement material

Fan/heat sink assembly

Description	Spare part number
Fan/heat sink assembly for use in models that use Universal Memory Architecture (UMA) graphics	595832-001
subsystem memory (includes thermal replacement material)
Fan/heat sink assembly for use in models that use discrete graphics subsystem memory (includes	595833-001
thermal replacement material)
Fan/heat sink assembly for use in models that use HD545V discrete graphics subsystem memory	617024-001
(for model 1.1 only)
Fan/heat sink assembly for use in models that use GL40 Universal Memory Architecture (UMA)	606573-001
graphics subsystem memory (includes thermal replacement material)
Thermal pad kit for South Bridge chipset	634433-001
Fan/heat sink assembly for use in models that use discrete graphics subsystem memory (for	634650-001
model 1.3 only)
Fan/heat sink assembly for use in models that use Universal Memory Architecture (UMA) graphics	634651-001
subsystem memory (includes thermal replacement material) (for model 1.3 only)

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 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 52).

5.Remove the following components:

a.Hard drive (see Hard drive on page 53)

b.Optical drive (see Optical drive on page 56)

c.Keyboard (see Keyboard on page 63)

d.Top cover (see Top cover on page 65)

e.Speaker assembly (see Speaker assembly on page 68)

f.Display assembly (see Display assembly on page 76)

g.System board (see System board on page 83)

ENWW Component replacement procedures 91