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System board
Description Spare part number
System board (includes processor and replacement thermal material)
●
Intel Atom N270 1.6-GHz processor, 512-KB Level 2 cache, 533-MHz front-side bus (FSB) 594804-001
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Intel Atom N270 1.6-GHz processor, 512-KB Level 2 cache, 533-MHz front-side bus (FSB) for
use with WWAN option
599187-001
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 36).
5. If your computer has WWAN capability, remove the SIM (see
SIM on page 37).
6. Remove the following components:
a.
Keyboard (see
Keyboard on page 40)
b. Hard drive (see
Mass storage devices on page 44)
c. Top cover (see
Top cover on page 46)
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
WLAN module on page 49)
●
WWAN module, if included (see
WWAN module on page 52)
●
RTC battery (see
RTC battery on page 43)
●
Heat sink assembly (see
Heat sink assembly on page 58)
Remove the system board:
1. Release the tape securing the WWAN antennas (1).
60 Chapter 4 Removal and replacement procedures