HP ProBook 450 G2 Notebook PC HP ProBook 455 G2 Notebook PC Maintenance and Service Guide

Speaker assembly
Description Spare part number
Speaker assembly 768138-001
NOTE: You must remove the left speaker to remove to function board cable.
Before removing the speaker assembly, 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 43).
5. Remove the following components:
a. Service doors (see
Service door on page 44).
b. Keyboard (see
Keyboard on page 56)
c. Hard drive (
Hard drive on page 46)
d. Optical drive (
Optical drive on page 50)
e. Top cover (see
Top cover on page 64)
Remove the speaker assembly:
1. Position the top cover upside-down.
2. Remove the 2 Phillips PM2.0×3.0 broadhead screws (1) that secure the speakers to the computer.
3. Slide the speakers toward each other to disengage them from the top cover (2).
68 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts