HP ZBook 15u G3 Mobile Workstation HP EliteBook 850 G3 Notebook PC HP EliteBook 840 G3 Notebook PC - Maintenance and Service Guide

a. Keyboard (see Keyboard on page 50)
b. Hard drive (see Hard drive on page 41)
c. Internal base plate (see Internal base plate on page 56)
d. Fingerprint reader assembly (see Fingerprint reader assembly on page 62)
e. Power button board (see Power button board on page 63)
f. USB/audio board (see USB/audio board on page 71)
g. Smart card reader board (see Smart card reader board on page 69)
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 44)
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WLAN/Bluetooth module (see WLAN/Bluetooth combo card on page 46)
●
WWAN module (see WWAN module on page 48)
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SSD (see SSD on page 43)
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RTC battery (see RTC battery on page 55)
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Heat sink/ fan assembly (see Heat sink/fan assembly on page 59)
Remove the system board:
1. Disconnect the following cables from the system board:
(1) Speaker cable
(2) Display cable
(3) Webcam cable (select products only)
Component replacement procedures 73