Maytag Repair Help

Help
I can’t afford to replace or repair my dishwasher, so I need to try a repair on my own.
The control panel doesn’t work and I believe the part # is AP4114872 but before I pull the trigger on a $110 order, is there something else I should check?

Help
The dishwasher I now have as a replacment (my wife) is making a whiny noise. I have an ohm meter and can open it up.

First, replace that replacement with one that doesn’t whine, (just speaking from experience, bro). Are you saying that the display is blank, or just that there’s no response from keypad presses?