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Remove the processor:
1. Position the computer upside-down.
2. Use a flat-bladed screwdriver to turn the processor locking screw (1) one-half turn
counterclockwise until you hear a click.
3. Lift the processor (2) straight up and remove it.
NOTE: The gold triangle (3) on the processor must be aligned with the triangle embossed on
the processor slot when you install the processor.
Reverse this procedure to install the processor.
Top cover
NOTE: All top covers include the touchpad assembly.
Description Spare part number
Top cover for use in model 4540s:
With a fingerprint reader 683506-001
Without a fingerprint reader 683507-001
For use in model 4440s/4441s:
With a fingerprint reader 683666-001
Without a fingerprint reader 683667-001
Before removing the top cover, 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.
Component replacement procedures 67