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In article ,
says...

Ned Simmons Wrote:

Lots of Airco welders are Millers, especially the old ABPs, but this
particular one is an Esab. I own one that I picked up cheap when it
was
nearly new because someone apparently liked their HF to jump at least
an
inch or two. The points were opened up way beyond the spec and the
excess HF had fried a $.05 diode on the control board.

Ned Simmons

Ned: I have taken possession of the welder and when I have done some
research I find it was made in 1988. I have taken the panels off and
find that there is a "blown" 470uf63v Nichicon axial capacitor on the
Interface Board. ESAB told me to go to ARC-Products for a new board.
ARC Products say that it is too new that they do not have a rebuild
exchange board for this welder. Well, I guess I am on my own. I can get
a new capacitor, and I can rebuild the Circuit Board. I will have to
solder the burnt sections of the electrical grid with wire. Usually a
blown capacitor is caused by something. Do you or anyone know what the
capacitor controls so that I can check for a problem. Thanks for any
help.

That's about the same age as mine. Rebuilt boards were available when I
got it in the early 90s. The main control board right behind the front
panel near the top of the machine, which was where my problem lay, was
less than $100 from a local welding supply that does repairs. In the
process of zeroing in on the problem I repaired the board, so never
actually purchased one.

Have you inquired at a shop that actually repairs welders?

Ned Simmons