Compaq Presario CQ40-400 Compaq Presario CQ40 Notebook PC - Maintenance and Se - Page 86

the nVIDIA video chip, locations on the heat sink: the four specifically marked areas

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3. Remove the heat sink (2). NOTE: The thermal material must be thoroughly cleaned from the surface of the heat sink (1) and the processor (2) each time the heat sink is removed. Thermal pads and thermal paste must also be installed on all surfaces before the heat sink is reinstalled. Thermal pads must be placed in all of the following locations on the heat sink: the four specifically marked areas (3), the nVIDIA video chip (4), the Northbridge chip (5), and the capacitors (6). Reverse this procedure to install the heat sink. 78 Chapter 4 Removal and replacement procedures

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3.
Remove the heat sink
(2)
.
NOTE:
The thermal material must be thoroughly cleaned from the surface of the heat sink
(1)
and the
processor
(2)
each time the heat sink is removed. Thermal pads and thermal paste must also be installed
on all surfaces before the heat sink is reinstalled. Thermal pads must be placed in all of the following
locations on the heat sink: the four specifically marked areas
(3)
, the nVIDIA video chip
(4)
, the
Northbridge chip
(5)
, and the capacitors
(6)
.
Reverse this procedure to install the heat sink.
78
Chapter 4
Removal and replacement procedures