HP ProBook 450 G2, Maintenance And Service Manual, Page: 94 / 169

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 36 ).
5. Remove the following components:
a. Service doors (see Service door on page 37 ).
b. Hard drive (see Hard drive on page 39 )
c. Optical drive (see Optical drive on page 43 )
d. WLAN module (see WLAN/Bluetooth combo card on page 45 )
e. WWAN module (see WWAN module on page 47 )
f. Keyboard (see Keyboard on page 49 )
g. Top cover (see Top cover on page 58 )
h. System board (see System board on page 78 )
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.
82 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts