HP ProBook 450 G3 Notebook PC - Maintenance and Service Guide

When replacing the system board, be sure to remove the following components from the defective system
board and install on the replacement system board:
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Memory modules (see Memory modules on page 41)
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WLAN/Bluetooth module (see WLAN/Bluetooth combo card on page 43)
●
WWAN module (see WWAN module on page 45)
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M.2 solid-state drive (see M.2 solid-state drive on page 47)
●
Heat sink (see Heat sink assembly on page 78)
Remove the system board:
1. Position the computer upright with the front toward you.
2. Disconnect the following cables from the system board:
(1) Power connector cable
(2) Display cable
(3) Battery connector cable
(4) Speaker cable
(5) Hard drive cable
3. Remove the 2 Phillips PM2.5×5.0 screws (1) that secure the system board to the computer.
72 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts