HP Presario A900 Compaq Presario A900 Notebook PC - Maintenance and Service Gu - Page 66

Fan

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4. Remove the USB board (4). Fan Reverse this procedure to reassemble and install the USB board. Description Fan Spare part number 462404-001 Before removing the fan, 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 34). 5. Remove the following components: a. Hard drive (see Hard drive on page 37) b. Optical drive (see Optical drive on page 44) c. Switch cover and keyboard (see Switch cover and keyboard on page 46) d. Display assembly (see Display assembly on page 50) e. Top cover (see Top cover on page 55) Remove the fan: 1. Disconnect the fan cable (1) from the system board. 2. Remove the Phillips PM2.5×9.0 screw (2) that secures the fan to the base enclosure. 58 Chapter 4 Removal and replacement procedures

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4
.
Remove the USB board
(4)
.
Reverse this procedure to reassemble and install the USB board.
Fan
Description
Spare part number
Fan
462404-001
Before removing the fan, 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
34
).
5
.
Remove the following components:
a
.
Hard drive (see
Hard drive
on page
37
)
b
.
Optical drive (see
Optical drive
on page
44
)
c
.
Switch cover and keyboard (see
Switch cover and keyboard
on page
46
)
d
.
Display assembly (see
Display assembly
on page
50
)
e
.
Top cover (see
Top cover
on page
55
)
Remove the fan:
1
.
Disconnect the fan cable
(1)
from the system board.
2
.
Remove the Phillips PM2.5×9.0 screw
(2)
that secures the fan to the base enclosure.
58
Chapter
4
Removal and replacement procedures