HP ProBook 640 G1, 645 G1, 650 G1, and 655 G1 Notebook PCs - Maintenance and Service Guide

Table Of Contents
2. Lift up on the left side to disconnect the connector interface (2).
3. Detach the USB board cable from the base enclosure (3), and remove the USB board and cable.
Reverse this procedure to install the USB board.
Power button board
Description Spare part number
Power button board (includes cable)
For 15.6-in. models 738701-001
For 14-in. models 738399-001
Before removing the power button board, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see Battery on page 56), and then remove the following components:
a. Service cover (see Service cover on page 57)
b. Hard drive (see Hard drive on page 58)
c. Optical drive (see Optical drive on page 69)
d. Keyboard (see Keyboard on page 72)
e. Base enclosure (see Base enclosure on page 82)
86 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts