Lenovo ThinkCentre 3231 Hardware Maintenance Manual page 153

The failing system board must be returned with a microprocessor socket cover to
protect the pins during shipping and handling.
To install the microprocessor socket cover:
1. Remove the microprocessor from the microprocessor socket. See "Replacing the
2. Close the microprocessor retainer and lock it into position with the small
3. Insert the tabs 1 of the socket cover into the hinged side of the socket, and
Figure 55. Tabs on the microprocessor socket cover (bottom view)
Figure 56. Installing the microprocessor socket cover
microprocessor" on page 142.
handle.
then press the other side of the socket cover downward until the tabs 2 snap
into position.
Chapter 9. Replacing FRUs - Desktop computers
147