I have used my Power Ultra 205 several times since receiving it in mid June but encountered my first problem with it tonite. I was cutting some 1/8 thick square tubing with the plasma cutter and the machine began to make an audible arcing/hissing/snapping sound inside. The indicator LEDs went out but the fans continued to run. I shut it off for several minutes and tried it again...that same arcing/hissing/snapping sound. I looked through the finned grill work on the front of the machine and could see arcing within. I don't know what to do now...please help. :cry: