Compaq Presario CQ42-400 Compaq Presario CQ42 Notebook PC and HP G42 Notebook - Page 101

Fan/heat sink assembly, Disconnect all external devices connected to the computer.

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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) graphics subsystem memory (includes thermal replacement material) 606573-001 Thermal pad kit for South Bridge chipset 634433-001 Fan/heat sink assembly for use in models that use discrete graphics subsystem memory (for model 1.3 only) 634650-001 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

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