HP ProBook 450 G2, Maintenance And Service Manual, Page: 70 / 169

Reverse this procedure to reassemble and install the display bezel, webcam/microphone module, and display
panel.
Top cover
NOTE: Top cover spare part kits include the touchpad assembly.
Description Spare part number
Top cover (includes touchpad) 768139-001
Before removing the top cover, 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 following components:
a. Battery (see Battery on page 36 ).
b. Service doors (see Service door on page 37 ).
c. Hard drive ( Hard drive on page 39 )
d. Optical drive ( Optical drive on page 43 )
e. Keyboard (see Keyboard on page 49 )
Remove the top cover:
1. Position the computer upside-down with the front toward you.
2. Remove the 6 rubber screw covers and 8 Torx T8M2.5×6.0 screws that secure the top cover to the
computer.
58 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts