It seems that the program doesn't work anymore on the tabletop dishwasher. The knob doesn't move from the start. When I put it on in the morning, it will be stuck in the same position later the same day, or if it has moved, it is stuck in another position for ages. I feel that if the cycle/program/circuit board thingy were to be replaced it would solve the problem, but I'm not an expert! many thanks.