Dell Vostro 220 (Late 2008) - Manual (Page 126)

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Processor
NOTICE:
When replacing the processor, do not touch any of the pins inside the
socket or allow any objects to fall on the pins in the socket.
6 Lift the processor to remove it from the socket and place it into antistatic
packaging.
Replacing the Processor
NOTICE:
Ground yourself by touching an unpainted metal surface, such as on the
back of the computer.
NOTICE:
You must position the processor correctly in the socket to avoid
permanent damage to the processor and the computer when you turn on the
computer.
1 Unpack the new processor, being careful not to touch the underside of
the processor.
1 processor cover 2 processor
3 socket 4 release lever
5 retention hook
1
2
3
4
5