This is a 2011 model that has modular boards, it predates the diagrams that Bruk provided. The symptoms suggest this board has failed if you've checked the fan motor and the wiring. This board controls the smoke fan. As to what failed on the board, it's really hard to say. There is no information on the board, but tracing the board fan connection on the board might lead you to a failing component. Personally, I just replace the board.
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