System board

NOTE: All system board spare part kits include replacement thermal material.

Description

Spare part number

 

 

For use in 4540s models with:

 

 

 

UMA graphics with WWAN

683496-001

 

 

UMA graphics without WWAN

683495-001

 

 

1-GB of discrete graphics memory

683493-001

 

 

2-GB of discrete graphics memory

683494-001

 

 

System board for use in 4440s/4441s models with:

 

 

 

1-GB discrete graphics

683493-001

 

 

2-GB discrete graphics

683494-001

 

 

UMA graphics without WWAN

683495-001

 

 

UMA graphics and with WWAN

683496-001

 

 

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 42).

5.Remove the following components:

a.Bottom door (see Bottom door on page 44).

b.Hard drive (see Hard drive on page 48)

c.Optical drive (see Optical drive on page 46)

d.Keyboard (see Keyboard on page 56)

e.Heat shield (see Heat shield on page 59)

f.Fan (see Fan on page 61)

g.Heat sink (see Heat sink on page 63)

h.Top cover (see Top cover on page 67)

Component replacement procedures 85