kenmore elite 665.13123k703 buttons don't work?

I have a kenmore elite 665.13123k703 dishwasher. All control panel buttons won't work except drain/cancel. called for a tech.sears said wouldn't be here for a week. next day the darn thing worked again. then it stopped working after 1 load. did some diagnostics. all the pushbuttons switches checked out ok with ohm meter. also the machine will run per the troubleshooting diagram with the pushbutton panel disconnected. what in the world could cause this situation? I also ran the reset code. no joy no lights come on except cancel/drain.