System board
NOTE: The system board spare part kit includes replacement thermal material.
Description Spare part number
For use in all countries and regions except the People's Republic of China: 685404-001
For use only in the People's Republic of China: 692857-001
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
Battery on page 44), and then remove the following components:
a.
Service cover (see
Service cover on page 46)
b.
Bluetooth module (see
Bluetooth module on page 48)
c. Speaker assembly (see
Speaker assembly on page 50)
d. Optical drive (see
Optical drive on page 51)
e. Hard drive (see
Hard drive on page 52)
f. Fan (see
Fan on page 54)
g. WWAN module (see
WWAN module on page 55)
h. Modem module (see
Modem module on page 62)
i. Keyboard (see
Keyboard on page 63)
j.
Base enclosure (see
Base enclosure on page 68)
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:
●
SIM (see
SIM on page 45)
●
Memory module (see
Memory module on page 47)
●
WLAN module (see
WLAN module on page 59)
●
RTC battery (see
RTC battery on page 66)
●
Heat sink (see
Heat sink on page 75)
●
Processor (see
Processor on page 78)
Component replacement procedures
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