Frigidaire dishwasher won't start -- all lights out -- no keypad response

Hello!

I have a frigidaire FDBB2040FS3 dishwasher about a year or two old.

Yesterday I walked up to it and the "Hi Temp Wash" and "Air Dry" buttons were lit solid and buttons were not responding. I hit cancel, and all lights cleared, and we were then able to run the dishwasher as normally.

Today we got home and the same two lights were lit. No button combination, including cancel, did anything. We power-cycled the circuit breaker and the two lights cleared. However, none of the buttons have any effect – i.e., mode lights will not change and the washer will not start.

Any ideas?

Thanks!!