Dishwasher control panel; start/cancel, auto clean, heavy wash, heated dry, sanitize, tuf scrub, & hi temp wash buttons do not light when pressed. Normal wash lights up only when delay 2-4-6 button is pressed. Lightwash and rinse only lights come on when pushed. Dishwasher does not function at all. Is the control panel bad or is the circuit board bad or could they both be bad?