HP Dv4 1540us Service Guide - Page 111

USB board, Remove the Phillips PM2.5×4.0 screw

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USB board Description USB board (includes USB board cable) Spare part number 486842-001 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 55). 5. Remove the following components: a. Hard drive (see Hard drive on page 59) b. Wireless module compartment cover (see WLAN module on page 62) c. Optical drive (see Optical drive on page 57) d. Keyboard (see Keyboard on page 72) e. Keyboard cover (see Keyboard cover on page 74) f. Display assembly (see Display assembly on page 80) g. Top cover (see Top cover on page 92) Remove the USB board: 1. Disconnect the USB board cable (1) from the system board. 2. Remove the cable (2) from the clip in the base enclosure. 3. Remove the Phillips PM2.5×4.0 screw (3) that secures the USB board to the computer. Component replacement procedures 103

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USB board
Description
Spare part number
USB board (includes USB board cable)
486842-001
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
55
).
5.
Remove the following components:
a.
Hard drive (see
Hard drive
on page
59
)
b.
Wireless module compartment cover (see
WLAN module
on page
62
)
c.
Optical drive (see
Optical drive
on page
57
)
d.
Keyboard (see
Keyboard
on page
72
)
e.
Keyboard cover (see
Keyboard cover
on page
74
)
f.
Display assembly (see
Display assembly
on page
80
)
g.
Top cover (see
Top cover
on page
92
)
Remove the USB board:
1.
Disconnect the USB board cable
(1)
from the system board.
2.
Remove the cable
(2)
from the clip in the base enclosure.
3.
Remove the Phillips PM2.5×4.0 screw
(3)
that secures the USB board to the computer.
Component replacement procedures
103