HP EliteBook 755 G4 Notebook PC & HP EliteBook 745 G4 Notebook PC - Maintenance and Service Guide

4. Pull the system board up and toward the right to remove it from the computer (2).
Reverse this procedure to install the system board.
Speaker assembly
Description Spare part number
Speaker assembly (includes cable) 821170-001
Before removing the speaker assembly, follow these steps:
1. Turn o 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the bottom cover (see Bottom cover on page 35).
5. Remove the battery (see Battery on page 40).
6. Remove the keyboard (see Keyboard on page 50).
7. Remove the heat sink/fan assembly (see Heat sink/fan assembly on page 58).
8. Remove the system board (see System board on page 71).
Remove the speaker assembly:
1. Remove the two Phillips PM2.5x2.5 screws that secure the speakers to the computer (1).
74 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts