Description

Spare part number

 

 

 

●

For use in models with Windows 8 Professional

688852-601

 

 

System board for use only with computer models equipped with an Intel HM75 chipset that include an Intel

 

Core i5 or i3 processor

 

 

 

 

●

For use in models without Windows 8

685761-001

 

 

 

●

For use in models with Windows 8 Standard

685761-501

 

 

 

●

For use in models with Windows 8 Professional

685761-601

 

 

System board for use only with computer models equipped with an Intel HM70 chipset that include an Intel

 

Pentium or Celeron processor

 

 

 

 

●

For use in models without Windows 8

685768-001

 

 

 

●

For use in models with Windows 8 Standard

685768-501

 

 

 

●

For use in models with Windows 8 Professional

685768-601

 

 

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 36).

5.Remove the following components:

●WLAN module (see WLAN module on page 45)

●Hard drive (see Hard drive on page 49)

●Keyboard (see Keyboard on page 54)

●Top cover (see Top cover on page 57)

●Speakers (see Speakers on page 65)

●USB board (see USB board on page 67)

●Power connector cable (see Power connector cable on page 69)

●Display assembly (see Display assembly on page 71)

6.Disconnect the display cable from the system board (see Display assembly on page 71).

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:

●Memory module (see Memory module on page 47)

●RTC battery (see RTC battery on page 51)

ENWW

Component replacement procedures 81