Smart Auto Light Blinking

The Smart Auto Light is blinking. The dishwasher will start, go into drain mode, then start to add water when it suddenly stops, Smart Auto starts blinking and it goes thru several drain cycles. I have powered it off and turned it back on, I have turned OFF the circuit breaker for 5+ minutes, then switched it back on the circuit breaker and no luck. I have replaced the Brake Case. It still does not work. I am stumped and frustrated. A repair tech came out and did an electrical test and said the main board is fine and suggested the Brake Case replacement. What is wrong? HGow do I fix this? Please help!