System board

NOTE: The system board spare part kit includes replacement thermal material.

Description

Spare part number

 

 

Intel Atom™ N450 1.66-GHz processor with 512-KB level 2 cache, 667-MHz FSB

607740-001

 

 

Intel Atom™ N470 1.83-GHz processor with 512-KB level 2 cache, 667-MHz FSB, 6.5W TDP

607741-001

 

 

Intel Atom™ N455 1.66-GHz processor with 512-KB level 2 cache, 667-MHz FSB

618873-001

 

 

Intel Atom™ N475 1.83-GHz processor with 512-KB level 2 cache, 667-MHz FSB, 6.5 TDP

618874-001

 

 

Intel Atom™ N450 1.66-GHz processor with 512-KB level 2 cache, 667-MHz FSB without WWAN

621300-001

module

 

 

 

Intel Atom™ N470 1.83-GHz processor with 512-KB level 2 cache, 667-MHz FSB, 6.5W TDP

621301-001

without WWAN module

 

 

 

Intel Atom™ N455 1.66-GHz processor with 512-KB level 2 cache, 667-MHz FSB without WWAN

621302-001

module

 

 

 

Intel Atom™ N475 1.83-GHz processor with 512-KB level 2 cache, 667-MHz FSB, 6.5 TDP without

621303-001

WWAN module

 

 

 

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 38).

5.Remove the service cover (see Service cover on page 40).

6.Disconnect the hard drive cable from the system board (see Hard drive on page 41).

7.Disconnect the WWAN antenna cables from the WWAN module (see WWAN module on page 43).

8.Disconnect the WLAN antenna cables from the WLAN module (see WLAN module on page 46).

9.Remove the keyboard (see Keyboard on page 54).

10.Remove the top cover (see Top cover on page 57).

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 39)

●WWAN module (see WWAN module on page 43)

68 Chapter 4 Removal and replacement procedures