Lenovo ThinkCentre A70 7099 Hardware Maintenance Manual page 154

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 66. Tabs on the microprocessor socket cover (bottom view)
Figure 67. Installing the microprocessor socket cover
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Hardware Maintenance Manual
microprocessor" on page 135.
handle.
then press the other side of the socket cover downward until the tabs 2 snap
into position.