Technically it's not 'dead'--the machine turns on. But effectively it is: no arc.

HF works, but the arc won't fire. Same with lift/scratch: no arc. It doesn't seem to be a cable or control issue: I checked continuity through the torch/ground back into the unit. I also switched between pedal and finger control, and no change.

I opened the case, and though there are some questionable-looking solder joints nothing obvious seems out of place: capacitors look intact, connectors are connected. I reset the HF points to an 0.035 gap--still, no change.

Does anyone have any ideas? I've searched this forum, and see others with similar symptoms: HF, but no arc. I would really appreciate any insight anyone might have!