Lenovo ThinkCentre 7258 User Manual page 139

9. Remove the microprocessor socket cover from the new system board.
10. Remove the microprocessor from the failing system board and install it on the
new system board. See "Replacing the microprocessor" on page 135.
11. 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. Make sure the microprocessor has been removed from the microprocessor
socket, and then close the microprocessor retainer and lock it into position
with the small handle.
b. Insert the tabs 1 of the socket cover into the hinged side of the socket,
and then press the other side of the socket cover downward until the tabs
2 snap into position.
12. Position the new system board so that it is aligned with the mounting studs
then slide it to the rear of the chassis until it is fully seated.
Chapter 9. Replacing FRUs - 607 computers
133