Lenovo ThinkCentre A57, Hardware Maintenance Manual

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10. Install a new retention module or move the retention module from the failing system board to the new
system board.
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 10
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Replacing FRUs (Types 7066, 7098, 9352, 9359, 9482, 9487, 9622, 9704, 9785, 9794, 9807, 9859, 9952)
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