[TheForge] welder woes

[DragonsWatch]

HI gang,
    Was hoping someone might have an idea as to what may have died,
shorted, or otherwise become tango uniform in my welder.
    The story starts with me buying a used but in clean condition
Lincoln ac/dc 225 welder about 6 months past.  I took it home plugged it
in and burned up half a dozen 3/32 rods on some projects I had that had
been waiting welding.  Life was good.  I then went out of town for many
moons.  Well today I need to weld something, so I make ready, and when I
turn on the welder, it makes a loud buzzing  noise, and then opens the
feed breaker.  I tried all settings, AC, DC, and low current settings.
At low settings it hums instead of buzzing, but still pops the breaker
after about 20 seconds.
    I opened up the back and can not find any shorts or unwanted
critters.  Nor can I find any components that seem to be over heating.
The noise seems to be from one of the transformers, which I can not
tell.

Any ideas?  Are these usually worth bothering to take to repair?  I
don't want to spend a much repairing a used one as a new with warranty
costs.

Thanks,

Larry


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