HP EliteBook G3 EliteBook 820 G3 Notebook PC EliteBook 828 G3 Notebook PC- Mai - Page 60

WWAN module see, Heat sink/ fan assembly see

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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 Bottom cover on page 32). 5. Remove the battery (see Battery on page 35). 6. Remove the following components: a. Keyboard (see Keyboard on page 46) b. Hard drive (see Hard drive on page 36) c. SSD (see SSD on page 38) 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 Memory modules on page 40) ● WLAN/Bluetooth module (see WLAN/Bluetooth combo card on page 42) ● WWAN module (see WWAN module on page 44) ● RTC battery (see RTC battery on page 52) ● Heat sink/ fan assembly (see Heat sink/fan assembly on page 53) 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

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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
Bottom cover
on page
32
).
5.
Remove the battery (see
Battery
on page
35
).
6.
Remove the following components:
a.
Keyboard (see
Keyboard
on page
46
)
b.
Hard drive (see
Hard drive
on page
36
)
c.
SSD (see
SSD
on page
38
)
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
Memory modules
on page
40
)
●
WLAN/Bluetooth module (see
WLAN/Bluetooth combo card
on page
42
)
●
WWAN module (see
WWAN module
on page
44
)
●
RTC battery (see
RTC battery
on page
52
)
●
Heat sink/ fan assembly (see
Heat sink/fan assembly
on page
53
)
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