Lenovo ThinkCentre M70q Hardware Maintenance Manual page 74

Note: Carefully handle the system board by its edges.
6. Remove the microprocessor from the failing system board, and then install it onto the new system
board. See "Microprocessor" on page 64.
7. Install the new system board into the chassis by aligning the six screw holes in the new system board
with the corresponding mounting studs on the chassis. Then, install the six screws in the sequence to
secure the new system board.
8. Reinstall all parts that you have removed one by one in the reversed sequence as you remove them.
Refer to the information that you have noted down and the related topics in "Removing and installing
hardware" on page 35.
9. Connect all cables to the new system board. See "System board" on page 34.
10. Connect the external cables and the power cord 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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M70q Hardware Maintenance Manual