Compaq Presario CQ42-400 Compaq Presario CQ42 Notebook PC and HP G42 Notebook - Page 102

removed. Thermal pads and thermal paste must be installed on all surfaces before the fan/heat sink

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Remove the fan/heat assembly (fan/heat sink appearance may vary): 1. Turn the system board upside down. 2. Disconnect the fan cable (1) from the system board. 3. Follow the sequence embossed on heat sink to loosen the four Phillips PM2.5×7.0 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 the assembly. 4. Remove the fan/heat sink assembly (3). The thermal material must be thoroughly cleaned from the surface of the fan/heat sink assembly (1), (3) and the processor (2) and video components (4) each time the fan/heat sink assembly is removed. Thermal pads and thermal paste must be installed on all surfaces before the fan/heat sink assembly is reinstalled. NOTE: Thermal pads and thermal paste are included with all fan/heat sink assembly, system board, and processor spare part kits. The following illustration shows the locations for thermal material on systems with discrete graphics subsystems. 92 Chapter 4 Removal and replacement procedures ENWW

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Remove the fan/heat assembly (fan/heat sink appearance may vary):
1.
Turn the system board upside down.
2.
Disconnect the fan cable
(1)
from the system board.
3.
Follow the sequence embossed on heat sink to loosen the four Phillips PM2.5×7.0 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 the assembly.
4.
Remove the fan/heat sink assembly
(3)
.
The thermal material must be thoroughly cleaned from the surface of the fan/heat sink assembly
(1)
,
(3)
and the processor
(2)
and video components
(4)
each time the fan/heat sink assembly is
removed. Thermal pads and thermal paste must be installed on all surfaces before the fan/heat sink
assembly is reinstalled.
NOTE:
Thermal pads and thermal paste are included with all fan/heat sink assembly, system board,
and processor spare part kits.
The following illustration shows the locations for thermal material on systems with discrete graphics
subsystems.
92
Chapter 4
Removal and replacement procedures
ENWW