HP Pavilion TouchSmart 15-n300 Maintenance and Service Guide - Page 88

Heat sink assembly, and then remove the following components

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Heat sink assembly Description Spare part number Heat sink for use only on computer models equipped with a graphics subsystem with AMD UMA memory 734448-001 19 W Heat sink for use only on computer models equipped with a graphics subsystem with AMD UMA memory 734449-001 25 W Heat sink for use only on computer models equipped with a graphics subsystem with AMD discrete memory 19 W 734450-001 Heat sink for use only on computer models equipped with a graphics subsystem with AMD discrete memory 25 W 734451-001 For use only on computer models equipped with Intel HM76 chipset and UMA graphics 742330-001 For use only on computer models equipped with Intel HM76 chipset and switchable discrete graphics 742331-001 For use only on computer models equipped with Intel processors and UMA graphics 742581-001 For use only on computer models equipped with Intel processors and switchable discrete graphics 742582-001 NOTE: To properly ventilate the computer, allow at least 7.6 cm (3 in) of clearance on the left side 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. Turn off 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 the power from the computer by unplugging the power cord from the computer. 3. Disconnect all external devices from the computer. 4. Remove the battery (see Battery on page 40), and then remove the following components: a. Optical drive (see Optical drive on page 45). b. Service door (see Service door on page 42). c. WLAN module (see WLAN module on page 44). d. Memory module (see Memory module on page 42). e. Keyboard (see Keyboard on page 51). f. Top cover (see Top cover on page 55). g. Hard drive (see Hard drive on page 59). h. System board (see System board on page 68). Remove the heat sink assembly: 78 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts

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Heat sink assembly
Description
Spare part number
Heat sink for use only on computer models equipped with a graphics subsystem with AMD UMA memory
19 W
734448-001
Heat sink for use only on computer models equipped with a graphics subsystem with AMD UMA memory
25 W
734449-001
Heat sink for use only on computer models equipped with a graphics subsystem with AMD discrete
memory 19 W
734450-001
Heat sink for use only on computer models equipped with a graphics subsystem with AMD discrete
memory 25 W
734451-001
For use only on computer models equipped with Intel HM76 chipset and UMA graphics
742330-001
For use only on computer models equipped with Intel HM76 chipset and switchable discrete graphics
742331-001
For use only on computer models equipped with Intel processors and UMA graphics
742581-001
For use only on computer models equipped with Intel processors and switchable discrete graphics
742582-001
NOTE:
To properly ventilate the computer, allow at least 7.6 cm (3 in) of clearance on the left side 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.
Turn off 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 the power from the computer by unplugging the power cord from the computer.
3.
Disconnect all external devices from the computer.
4.
Remove the battery (see
Battery
on page
40
), and then remove the following components:
a.
Optical drive (see
Optical drive
on page
45
).
b.
Service door (see
Service door
on page
42
).
c.
WLAN module (see
WLAN module
on page
44
).
d.
Memory module (see
Memory module
on page
42
).
e.
Keyboard (see
Keyboard
on page
51
).
f.
Top cover (see
Top cover
on page
55
).
g.
Hard drive (see
Hard drive
on page
59
).
h.
System board (see
System board
on page
68
).
Remove the heat sink assembly:
78
Chapter 6
Removal and replacement procedures for Authorized Service Provider parts