The 2 most common part(s) or condition(s) which cause the symptom Dishwasher buttons don't work are listed below starting with the most likely. Check or test each item and watch any available videos.
RepairClinic Item # 1469709
If the buttons don't work on the control panel the entire touchpad and control panel assembly may need to be replaced. If the display works but the dishwasher functions are all out of synch, or some of the buttons don't respond properly the entire touchpad and control panel might need to be replaced.
RepairClinic Item # 1488670
The dishwasher has a main control board which regulates nearly every function in the dishwasher. If the control panel buttons don't work, and other causes have been ruled out, the main control board might need to be replaced.