Lenovo ThinkCentre 8289 Hardware Replacement Manual page 23

6. Use the vacuum pen 1 to lift the microprocessor straight up and out of the
socket.
Important
Do not touch the gold contacts on the bottom of the microprocessor. If
you must touch the microprocessor, touch only the sides.
a. Note the orientation of the notches 1 on the microprocessor. This is
important when reinstalling the microprocessor on the system board.
b. Do not drop anything on the socket while it is open. Keep all contacts as
clean as possible.
7. Make sure that the lever on the microprocessor retainer is fully open.
Chapter 2. Replacing hardware
15