lg ld-14aw2?

My dishwasher 7 days ago would stop shortly after starting with an error code IE after checking on web i found that it was an inlet valve issue and removed and cleaned valve and put back together.I found that dishwasher would work but then short the power supply and the trip switch would go,i thought that some water may have got on parts so i left for a week to dry out. i have just checked inlet valve and looked for leaks today and restarted machine on quick wash ( 26 mins ) to find machine working well until rinse cycle ( 18 mins ) and again power supply would trip the circuit breaker.... no evidence of water leaking?? do i need to get a repairer in or again is it something simple ?