Kitchen Aid DW won't start

Came home to find out my dishwasher won’t start. My wife is downstairs hand-washing dishes and NOT happy:mad: !! The lights on the control panel function but nothing happens when the start button is pushed. I have noticed over the past few months that the dishwasher has been running longer than usual but I assumed this was a water temperature issue. Is this a motor or panel issue? Any help appreciated:D !!
Thanks,
Gary

Gary,

Are any of the control panel lights blinking?

Here are the breakdown diagrams and http://www.appliancepartspros.com/partsearch/model.aspx?model_id=504385

Gene.

No blinking lights but I can get any of the lights to light up by pushing their function button. Only button that does not respond is the "start" button.
Thanks for your reply.
Gary