Hope you see this. This trick has saved me a million times and I hope it does the trick for you too.

Unscrew the dishwasher door and get the control panel off. The control panel connects to the dishwasher via a flat ribbon cable.

Clean the ends ribbon cable with a Staedtler white pencil eraser. Rub down the ribbon cable where it meets with the connector. You may see some corrosion there, or maybe not. It might not look like you're doing anything. But when you put it back together, the control panel works perfectly again!... For about 6 months, then you repeat the process for years until the door breaks from being unscrewed so many times. This has worked on my dishwasher and stove many many times.

Good luck.