HP Dv71270us Service Guide - Page 103

USB board, Remove the audio/infrared board

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Remove the audio/infrared board: 1. Disconnect the audio/infrared board cable (1) from the system board. 2. Remove the two Phillips PM2.5×4.0 screws (2) that secure the audio/infrared board to the base enclosure. 3. Lift the audio/infrared board (3) straight up to remove it from the base enclosure. Reverse this procedure to install the audio/infrared board. USB board Description USB board for use only with computer models equipped with AMD processors USB board for use only with computer models equipped with Intel processors Spare part number 488886-001 480479-001 Before removing the USB board, 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 51). 5. Remove the following components: a. Hard drive (see Hard drive on page 56) b. Optical drive (see Optical drive on page 54) c. Switch cover (see Switch cover on page 66) d. Keyboard (see Keyboard on page 68) e. Speaker assembly (see Speaker assembly on page 72) Component replacement procedures 95

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Remove the audio/infrared board:
1.
Disconnect the audio/infrared board cable
(1)
from the system board.
2.
Remove the two Phillips PM2.5×4.0 screws
(2)
that secure the audio/infrared board to the
base enclosure.
3.
Lift the audio/infrared board
(3)
straight up to remove it from the base enclosure.
Reverse this procedure to install the audio/infrared board.
USB board
Description
Spare part number
USB board for use only with computer models equipped with AMD processors
488886-001
USB board for use only with computer models equipped with Intel processors
480479-001
Before removing the USB board, 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
51
).
5.
Remove the following components:
a.
Hard drive (see
Hard drive
on page
56
)
b.
Optical drive (see
Optical drive
on page
54
)
c.
Switch cover (see
Switch cover
on page
66
)
d.
Keyboard (see
Keyboard
on page
68
)
e.
Speaker assembly (see
Speaker assembly
on page
72
)
Component replacement procedures
95