These Maytag touchpads are commonly bad i've changed 2 of them in the past 2 weeks from units that were 2-5 years old.
Turn the breaker off and pop the door open and keep it open.....................take the top part apart where the touchpad screws into the panel and disconnect the ribbon wire that goes from the touchpad to main control. Go turn breaker back on leaving that ribbon cable off and close the door....if you hear the drain pump turn on with a couple minutes then replace your touchpad it's bad.....if you do not hear the drain pump turn on after closing the door your main control is possibly going out and replace that. But be aware both main control and touchpad could be going out and you may need to replace both and they could cost you just as much as a new dishwasher. Good luck