System information

System board
NOTE: The system board spare part kit includes replacement thermal material.
Replacement thermal material is also available in the Thermal Material Kit, 646135-001.
Description Spare part number
For use only with computer models equipped with an Intel Pentium processor and a graphics
subsystem with discrete video memory
646176-001
For use only with computer models equipped with an Intel Pentium processor and a graphics
subsystem with UMA video memory
646175-001
For use only with computer models equipped with an Intel Celeron processor and a graphics
subsystem with UMA video memory
646174-001
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 35).
5. Remove the optical drive (see
Optical drive on page 36).
6.
Remove the WLAN module (see
WLAN module on page 39).
7. Disconnect the hard drive connector cable from the system board (see
Hard drive on page 42).
8. Remove the following components:
●
Keyboard (see
Keyboard on page 45)
●
Top cover (see
Top cover on page 48)
●
USB board (see
USB board on page 55)
●
Power connector cable (see
Power connector cable on page 56)
●
Display assembly (see
Display assembly on page 60)
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:
●
Memory module (see
Memory module on page 41)
●
RTC battery (see
RTC battery on page 70)
●
Fan and heat sink (see
Fan/heat sink assembly on page 72)
●
Processor (see
Processor on page 77)
Component replacement procedures
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