HP 340 G1 Maintenance And Service Manual page 79

Before removing the system board, follow these steps:
1.
Turn off 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 the power from the computer by unplugging the power cord from the computer.
3.
Disconnect all external devices from the computer.
4.
Remove the Battery (see
a.
Service cover (see
b.
Hard drive (see
c.
Optical drive (see
d.
Keyboard (see
e.
Top cover (see
f.
Speakers (see
NOTE:
When replacing the system board, be sure that the following components are removed from
the defective system board and installed on the replacement system board:
●
WLAN module (see
●
Solid-state drive (see
●
Memory modules (see
●
RTC battery (see RTC battery on page
●
Heat sink (see Heat sink on page
● Fan (see Fan on page
Remove the system board:
1. Release the ground tape (1) that secures the display panel cable to the system board.
2. Release the ZIF connector (2) to which the display panel cable is attached, and then disconnect
the display panel cable from the system board.
Battery on page 40), and then remove the following components:
Service cover on page
Hard drive on page 42)
Optical drive on page
Keyboard on page 52)
Top cover on page 55)
Speakers on page 64)
WLAN module on page
Solid-state drive on page
Memory module on page
77)
73)
76)
41)
50)
45)
47)
48)
Component replacement procedures
71