HP ProBook 450 G2, Maintenance And Service Manual, Page: 74 / 169

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 36 ).
5. Remove the following components:
a. Service doors (see Service door on page 37 ).
b. Keyboard (see Keyboard on page 49 )
c. Hard drive ( Hard drive on page 39 )
d. Optical drive ( Optical drive on page 43 )
e. Top cover (see Top cover on page 58 )
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).
62 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts