bosch SGS47EO2GB resets itself after ten minutes?

Anybody help. My Bosch Dishwasher, four years old sets off nicely but then stops with the clock showing 0.00 when its only been running for ten minutes or so. This happens on all the wash modes. Water pressure in seems fine and I can hear the drain going. Taken out PCB and that 'appears' ok and not obviously burnt out.

JAG
July 2009