Lenovo ThinkCentre Hardware Maintenance Manual page 141

9. The failing system board must be returned with a microprocessor socket cover
to protect the pins during shipping and handling. Install the microprocessor
socket cover removed from the new system board on the failing system board.
To install the microprocessor socket cover:
a. Release the lever securing the microprocessor retainer and open the
retainer to access the microprocessor.
b. Grasp the microprocessor on the sides and lift it straight up and out of the
socket. Do not touch the contacts on the microprocessor socket.
c. Align the notches 1 of the microprocessor socket cover with the
alignment keys 2 of the microprocessor socket. Lower the socket cover
straight down into the microprocessor socket on the system board.
Note: Your microprocessor socket and cover might look slightly different
from the illustration.
Chapter 9. Replacing FRUs - 607 computers
135