My dishwasher is about a year and a half old.  Tonight it just began to randomly turn on and off on its own.  It didn't stop until I turned the breaker off to the dishwasher.  I left the power off for an extended period of time and when I turned power back on it started to turn on and off randomly again.  I'm guessing the control board is bad but I really hope Samsung makes a quality enough product that it doesn't break in less than 2 years.  It def was not a cheap appliance!