Start with the obvious--and simplest place to check. Are you getting power to the dishwasher? Check the wiring connections under the machine to make sure none of them is loose. [COLOR="Red"]It's best to turn it off at the breaker before you start this check, to prevent injury or electrocution.[/COLOR]

If the power is there, and the connections are secure, the next place to check is for power to the door switch; If you get power to the switch, close the switch [COLOR="red"](Remembering that 120VAC is lethal)[/COLOR] and check to see if it goes all the way to the control board.

Tell us what you find.