System board
Description Spare part number
System board for use with heat sink spare part number 446446-001 (includes 128 MB of discrete
video memory)
446403-001
System board for use with heat sink spare part number 446446-001 (includes 64 MB of discrete video
memory)
446404-001
System board for use with heat sink spare part number 446447-001 (video memory is shared with
main system memory)
446402-001
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 42).
5.
Remove the following components:
a.
Hard drive (see
Hard drive on page 46)
b.
Bluetooth module (see
Bluetooth module on page 48)
c.
MultiBay II device (see
MultiBay II device on page 56)
d.
Keyboard (see
Keyboard on page 57)
e.
Switch cover (see
Switch cover on page 64)
f.
Fan assembly (see
Fan assembly on page 66)
g.
Heat sink (see
Heat sink on page 67)
h.
Display assembly (see
Display assembly on page 71)
i.
Top cover (see
Top cover on page 76)
j.
Smart card reader board (see
Smart card reader board on page 79)
k.
Microphone (see
Smart card reader board on page 79)
l.
Speaker assembly (see
Speaker assembly on page 82)
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:
●
SIM (see
SIM on page 43)
●
Memory modules (see
Expansion memory module on page 50 and Primary memory module
on page 61)
Component replacement procedures 83