HP ProBook 4740s HP ProBook 4740s Notebook PC - Maintenance and Service Guide - Page 68

Audio board, Disconnect the smaller touchpad button cable

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Audio board Description Audio board Spare part number 683475-001 Before removing the audio 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 33). 5. Remove the following components: a. Bottom door (see Bottom door on page 34). b. Keyboard (see Keyboard on page 45) c. Top cover (see Top cover on page 47) Remove the audio board: 1. Position the computer upright with the front toward you. 2. Disconnect the smaller touchpad button cable (1). 3. Remove the Phillips PM2.0×3.0 screw (2) that secures the audio board to the computer. 4. Rotate the top of the board upward, pull the board away from the connectors (to remove them from top cover holes), and then lift the board off the top cover (3). 60 Chapter 4 Removal and replacement procedures

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Audio board
Description
Spare part number
Audio board
683475-001
Before removing the audio 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
33
).
5.
Remove the following components:
a.
Bottom door (see
Bottom door
on page
34
).
b.
Keyboard (see
Keyboard
on page
45
)
c.
Top cover (see
Top cover
on page
47
)
Remove the audio board:
1.
Position the computer upright with the front toward you.
2.
Disconnect the smaller touchpad button cable
(1)
.
3.
Remove the Phillips PM2.0×3.0 screw
(2)
that secures the audio board to the computer.
4.
Rotate the top of the board upward, pull the board away from the connectors (to remove them
from top cover holes), and then lift the board off the top cover
(3)
.
60
Chapter 4
Removal and replacement procedures