System information

System board
Description Spare part number
For use only with computer models equipped with microphones 448596-001
For use only with computer models not equipped with microphones 448598-001
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:
●
RTC battery (see
RTC battery on page 41)
●
Memory modules (see
Memory module on page 42)
●
WLAN module (see
WLAN module on page 39)
●
Modem module (see
Modem module on page 64)
Before removing the system board, follow these steps:
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 battery (see
Battery on page 36).
5.
Remove the following components:
a.
Hard drive (see
Hard drive on page 37)
b.
Optical drive (see
Optical drive on page 44)
c.
Keyboard (see
Keyboard on page 46)
d.
Switch cover (see
Switch cover on page 49)
e.
Display assembly (see
Display assembly on page 51)
f.
Top cover (see
Top cover on page 57)
g.
Wireless switch board (see
Wireless switch board on page 62)
h.
Audio board (see
Audio board on page 66)
i.
Bluetooth module (see
Bluetooth module on page 67)
j.
USB board (see
USB board on page 68)
Remove the system board:
1. Disconnect the power connector cable (1) from the system board.
ENWW Component replacement procedures 73