Lenovo ThinkCentre M70c Hardware Maintenance Manual page 96

10. Carefully put the system board into the chassis.
Note: Carefully handle the system board by its edges.
11. Install the new system board into the chassis by aligning the screw holes in the new system board with
the corresponding mounting studs on the chassis. Then, install the screws in the sequence as shown to
secure the new system board.
12. Connect all cables to the new system board. See "System board" on page 54.
13. Reinstall the removed parts. Then, reconnect the power adapter and all disconnected cables to the
computer.
The failing system board must be returned with a microprocessor socket cover to protect the pins during
shipping and handling.
Microprocessor socket cover installation procedure
1. After you have removed the microprocessor from the failing system board, close the microprocessor
retainer. Then, put the lever to the locked position to secure the retainer in place.
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M70c Hardware Maintenance Manual