HP EliteBook 820 G3 Maintenance And Service Manual page 60

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 bottom cover (see
5. Remove the battery (see
6. Remove the following components:
a. Keyboard (see
b. Hard drive (see
c. SSD (see
When replacing the system board, be sure to remove the following components from the defective system
board and install on the replacement system board:
● Memory modules (see
WLAN/Bluetooth module (see
●
● WWAN module (see
● RTC battery (see
Heat sink/ fan assembly (see
●
Remove the system board:
1. Disconnect the following cables from the system board:
(1) Speaker cable
(2) WLAN cables
(3) WWAN cables
(4) Display cable
50 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
Bottom cover on page
Battery on page
Keyboard on page 46)
Hard drive on page
SSD on page 38)
Memory modules on page
WLAN/Bluetooth combo card on page
WWAN module on page
RTC battery on page 52)
Heat sink/fan assembly on page
32).
35).
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42)