i have a powertig 250ex early 2012 model, been great for years, welded a huge project with it at the end of last summer, now that winter has gone i went to use it this weekend for a small aluminum job and nothing, hi-freq start works, as i can see it and hear it, amps stay anywhere fro 4 to 7, the amp knob does nothing, the start amps and end amps knobs will intermittently adjust my amperage on the screen, but the puddle is absolute garbage, pedal still sends signal, so am i screwed and time for a new welder?

thanks.