My Amadeal 25LV mill, which has worked well for 6 years suddenly stopped today and I wonder if anyone can please help diagnose the problem. It was running ok on a light cut and the earth leakage trip just cut the power. When I reset the trip the display lit up and the contactor went in but there was no number displayed and nothing happened when I turned the speed pot. The display was lit up and I checked the fuse and it is ok. There is no evidence of burning on the control board but it is potted so you can't see much. There are no loose wires, no smoke or smell.