Welder gave out on me.

Most of the controls are likely on the primary side of transformer. There is a high frequency that rides on top. But even without that it should burn rod. There may be a bad connection, likely on the output, since it is weak on all settings. There might be an inductor on the output.

I can do without schematic, pictures will help.

I did some welding on my bush hog deck. I had problems starting arcs. I finished, putting the cables away, the striker clamp fell off the cable. The Allen set screw was jammed, so it felt tight, but was not.