Looking for some troubleshooting advice......

I haven't used my PowerPlasma 50 in a long time (over a year?) due to working on other projects. When I went to use it today, the torch wouldn't stay on. It would switch off, then typically come right back on in less than a second. This happened both when cutting and when just the pilot arc.

My first thought was a wiring issue with the switch, but movement didn't see to affect it.

Any ideas would be appreciated.

Thanks,
Rege