HP Notebook PC (AMD) HP 255 G4 Notebook PC - Maintenance and Service Guide

4. Start prying at the front of the computer and work around to the back to separate the bottom cover
from computer (1).
5. Remove the bottom cover (2).
Reverse this procedure to install the bottom cover.
Optical drive board
Description Spare part number
Optical drive board (includes cable) 813956-001
Before removing the optical drive board, 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 30).
5. Remove the optical drive (see Optical drive on page 31), if installed.
6. Remove the bottom cover (see Bottom cover on page 37).
To remove the optical drive board:
1. Disconnect the cable from the system board (1).
2. Remove the Phillips PM2.0×2.4 screw (2) that secures the optical drive board to the computer.
38 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts