HP ENVY dv4-5b00 HP Envy dv4 Maintenance and Service Guide - Page 63

Fan/heat sink assembly, Remove the fan/heat sink assembly

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Fan/heat sink assembly NOTE: The fan/heat sink assembly spare part kit include replacement thermal material. Description Fan/heat sink assembly Spare part number 681226-001 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. Shut down the computer. 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 30), and then remove the following components: a. Service door (see Service door on page 32) b. Hard drive (see Hard drive on page 33) c. Optical drive (see Optical drive on page 36) d. WLAN module (see WLAN module on page 39) e. Keyboard (see Keyboard on page 42) f. Top cover (see Top cover on page 45) g. System board (see System board on page 52) Remove the fan/heat sink assembly: 1. Turn the system board upside down, with the front toward you. 2. Disconnect the fan cable (1) from the system board. 3. Following the 1, 2, 3, 4, 5, 6, 7 sequence stamped into the fan/heat sink assembly, loosen the four captive screws (2) and the three captive screws (3) that secure the fan/heat sink assembly to the system board. 4. Remove the Phillips M2.0×5.0 screw (4) that secures the fan/heat sink assembly to the system board. Component replacement procedures 55

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Fan/heat sink assembly
NOTE:
The fan/heat sink assembly spare part kit include replacement thermal material.
Description
Spare part number
Fan/heat sink assembly
681226-001
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.
Shut down the computer.
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
30
), and then remove the following components:
a.
Service door (see
Service door
on page
32
)
b.
Hard drive (see
Hard drive
on page
33
)
c.
Optical drive (see
Optical drive
on page
36
)
d.
WLAN module (see
WLAN module
on page
39
)
e.
Keyboard (see
Keyboard
on page
42
)
f.
Top cover (see
Top cover
on page
45
)
g.
System board (see
System board
on page
52
)
Remove the fan/heat sink assembly:
1.
Turn the system board upside down, with the front toward you.
2.
Disconnect the fan cable
(1)
from the system board.
3.
Following the 1, 2, 3, 4, 5, 6, 7 sequence stamped into the fan/heat sink assembly, loosen
the four captive screws
(2)
and the three captive screws
(3)
that secure the fan/heat sink
assembly to the system board.
4.
Remove the Phillips M2.0×5.0 screw
(4)
that secures the fan/heat sink assembly to
the system board.
Component replacement procedures
55