1. Refer to section 3.1 to remove electronics cover.
2. Remove 4 screws to take off the interface plate.
2. Refer to section 3.4 to remove multi-interface board.
3. Disconnect all connectors to replace the main board. Remove 2 copper pillars
and 2 screws.
4. Replace the main board.
5. Reassemble the parts in the reverse procedures.