System board, Description Spare part number

Reverse this procedure to reassemble and install the display assembly.

System board

NOTE: The system board spare part kit includes replacement thermal material. Replacement thermal material is also available in the Thermal Material Kit, spare part numbers 650277-001 (for use only with computer models equipped with an AMD processor) and 646135-001 (for use only with computer models equipped with an Intel processor).

Description	Spare part number

For use only with computer models equipped with an AMD E450 1.65-GHz processor (dual core,	657323-001
18 W) and a graphics subsystem with UMA video memory

For use only with computer models equipped with an AMD E350 1.60-GHz processor (dual core,	647320-001
18-W) and a graphics subsystem with UMA video memory

For use only with computer models equipped with an AMD E300 1.30-GHz processor (dual core,	657324-001
18 W) and a graphics subsystem with UMA video memory

For use only with computer models equipped with an AMD E240 1.50-GHz processor (single core,	647322-001
18-W) and a graphics subsystem with UMA video memory

For use only with computer models equipped with an AMD C50 1.00-GHz processor (1.0-	653985-001
MB L2 cache, dual core, 9 W) and a graphics subsystem with UMA video memory

For use only with computer models equipped with an Intel Core i5 or i3 processor and a graphics	646179-001
subsystem with discrete video memory

For use only with computer models equipped with an Intel Core i5 or i3 processor and a graphics	646177-001
subsystem with UMA video memory

For use only with computer models equipped with an Intel Pentium processor and a graphics	646176-001
subsystem with discrete video memory

For use only with computer models equipped with an Intel Pentium processor and a graphics	646175-001
subsystem with UMA video memory

For use only with computer models equipped with an Intel Celeron processor and a graphics	646174-001
subsystem with UMA video memory

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 optical drive (see Optical drive (select models only) on page 40).

6.Remove the WLAN module (see WLAN module on page 43).

Component replacement procedures 69