HP ProBook 450 G3 Notebook PC - Maintenance and Service Guide

Speaker assembly
Description Spare part number
Speaker assembly 828420-001
Before removing the speaker assembly, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is o 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 rst 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. Service doors (see Service doors on page 35).
b. Optical drive (Optical drive on page 37)
c. Hard drive (Hard drive on page 39)
d. Keyboard (see Keyboard on page 48)
e. Top cover (see Top cover on page 53)
f. System board (see System board on page 71)
Remove the speaker assembly:
1. Position the computer upright.
2. Disconnect the speaker cable from the system board (1).
3. Remove the Phillips PM2.0×5.0 screw (2) that secures the left speaker to the computer.
76 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts