My Kenmore Elite dishwasher is leaking around the turbidity sensor so I presume I need to replace this due to the lead. However when I hit start on the cycle it will fill with water and then it seems to lock up and not proceed any farther in the cycle. I try to hit cancel to drain it but it does not respond. No buttons respond on the keypad, but my cycle selection from the beginning is still it up. Could the turbidity sensor be causing this to lock up and stop running? Or is it a problem with the control board? Or what could it be?