I havnt used my 250EX for 6 weeks or so. Had a little job come up for my brother. I pulled the machine out of the corner pulled the power cord out and plugged it in, and got the work ready for welding. Powered up the machine and get a strange display on the display -I00C (except the C is facing backwards) is what appears. when you depress the pedal it stays and the machine is WIDE OPEN on amps cannot get the machine to respond to adjustments, very very little time is on this unit. I need HELP !