HP ProBook 440 G1 Notebook PC Maintenance and Service Guide

USB/audio board
Description Spare part number
USB/audio board 721542-001
Before removing the USB/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 37).
5. Remove the following components:
a. Service door (see
Service door on page 38).
b. Keyboard (see
Keyboard on page 50)
c. Optical drive (
Optical drive on page 42)
d. Top cover (see
Top cover on page 54)
Remove the USB/audio board:
1. Position the top cover upside-down.
2. Disconnect the cable that routes to the system board (1).
3. Disconnect the cable that routes to the fingerprint reader board (2).
4. Remove the Phillips PM2.5×4.0 screw (3) that secures the USB/audio board to the computer.
5. 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 (4).
Reverse this procedure to install the USB/audio board.
Component replacement procedures
67