whirlpool adg6340 inlet valve and pumping pulsing on/off

i have a whirlpool adg6340 and no matter which programme i select, the start/pause constantly flashes (not showing an error codes) and the inlet valve pulses letting in the water and then pulses off repeats this every two seconds for around two mins and then the pump starts pulsing on and off fot two mins… I checked the sensor on the side of dishwasher (ok), and i checked the pressure switch at the bottom of the sump(ok) so it wud appear to be the board?? However there doesnt seem to be any signs of anything blown on the board….any bit of advice or help would be greatful