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

Optical drive extension board
You must remove the system board to remove the optical drive extension board.
Before removing the optical drive extension board, 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. Hard drive (see
Hard drive on page 46)
c. Optical drive (see
Optical drive on page 50)
d. WLAN module (see
WLAN/Bluetooth combo card on page 52)
e. WWAN module (see
WWAN module on page 54)
f. Keyboard (see
Keyboard on page 56)
g. Top cover (see
Top cover on page 64)
h. System board (see
System board on page 84)
Remove the optical drive extension board:
1. Position the system board upright.
2. Pull the optical drive extension board straight away from the side of the system board.
Reverse this procedure to install the optical drive extension board.
Component replacement procedures 89