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Description Spare part number
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For use in models with Windows 8 Standard 715890-501
System board for use only with computer models equipped with an AMD E1-1200 processor
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For use in models without Windows 8 688278-001
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For use in models with Windows 8 Standard 688278-501
System board for use only with computer models equipped with an Intel Core i5 or i3 processor and a graphics subsystem with UMA
video memory (RCTO system board for use in Brazil and India only)
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For use in models without Windows 8 685107-001
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For use in models with Windows 8 Standard 685107-501
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For use in models with Windows 8 Professional 685107-601
System board for use only with computer models equipped with an Intel Pentium or Celeron processor and a graphics subsystem with
UMA video memory (RCTO system board for use in Brazil and India only)
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For use in models without Windows 8 685783-001
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For use in models with Windows 8 Standard 685783-501
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For use in models with Windows 8 Professional 685783-601
Thermal pad (for use with all models) 651046-001
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 39).
5. Remove the following components:
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WLAN module (see
WLAN module on page 48)
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Hard drive (see
Hard drive on page 53)
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Keyboard (see
Keyboard on page 58)
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Top cover (see
Top cover on page 61)
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Speakers (see
Speakers on page 69)
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USB board (see
USB board on page 71)
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Power connector cable (see
Power connector cable on page 73)
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Display assembly (see
Display assembly on page 75)
6. Disconnect the display cable from the system board (see
Display assembly on page 75).
ENWW Component replacement procedures 85