I purchased an eastwood plasma cutter a few months ago. Worked great until today. I was cutting out a panel and the ‘arc’ simply quit. Air pressure was still there, I checked for voltage at the plug & it was still good. Figured the nozzle was maybe plugged or something so I replaced the nozzle & tip. Fired it back up – it arced for about 2seconds and then a loud pop or bang & now nothing? Any thoughts?