HP EliteBook 725 G4 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 unscrewing the power cord from the AC outlet, and
then unscrewing 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. solid-state drive (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 36).
Keyboard on page 46)
Hard drive on page 37)
Solid-state drive on page
Memory modules on page
WLAN module on page
WWAN module on page
RTC battery on page 52)
Heat sink/fan assembly on page
33).
38)
40)
42)
44)
53)