I would try resetting the dishwasher by turning off the breaker for 10 minutes and turning it back on it and that would work for the first 2 times. But then it didn't work the 3rd time. I tried checking to see if it was in demo mode, nope. I tried everything that I could find on the internet that had to do with trouble shooting. There wasn't anything that came up with the testing and flashing lights. So I ordered a new control board. It was very simple to find out which one I needed for my specific model of dishwasher from your website. It arrived, and we installed it. And now my dishwasher runs perfectly again. Thank you for an easy purchase!