Normal wash light is blinking constantly

KitchenAid Dishwasher - KUDC03IVBL4. Normal wash light is blinking constantly. I have tried power off & resetting control board. When I reset control board it appears to cycle through program then stops after 1-2 min with all lights lit up (is this normal) I then hit the cancel button and it will drain then stop with all lights off. After 1-2 min the Normal light will start blinking again. From other posts it looks like it could be keypad or control board - how can I verify which it is or if it is another issue?