I just purchased a home with a GE Profile dishwasher. The keypad is stuck in normal mode. All keypad buttons are unresponsive except the start button. I did get it to run for a bit, but it doesn't seem to be responding to all commands.

I was wondering whether I should consider the keypad or the main control panel. At this point i am leaning towards the keypad, but i don't want to waste $70 to find out it's the control panel. Any suggestions?

Thanks

Clean the contacts on the ribbon going from the keypad to main board and test it. Another test you can do is turn off the breaker or unplug the unit and disconnect that ribbon then turn the power back on.........Rule of thumb but it doesn't apply to all units is that if it goes into a drain cycle after you restore power the main board is good and the keypad is bad. Sorry can't give you a direct answer because it can be the keypad or the section of the main board that receives the ribbon from the keypad. If you buy from this site and the part doesn't work you can return it.
Here's your parts list
Escutcheon & Door Assembly parts for GE PDW9980L00SS - AppliancePartsPros.com