Older Syncro 180 Problems

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I have an older Syncrowave 180 SD pre digital readouts, it has very low hours on it.I was welding some 1/8 aluminum sheet a few weeks ago and everything was fine.I fired it up the other day to stick some steel together and now have no amperage control. It appears the amperage dial/pot on the panel isn't working.Neither a foot pedal or finger remote will work, they will start a small arc and control the HF. I do get a small arc and HF but not enough current to weld.DCEP, DCEN or AC makes no difference.There's no difference between Stick welding and TIG... almost no amperage.I have checked my input voltage and amperage, even tried running it off a large generator, still very little output amperage.Ground, torch, cables, internal connections are all tight and triple checked. Even ran a separate ground.The amperage adjust dial/pot on the panel just seems to do nothing.Any ideas on why it would quit working like this? I need to find a cheap fix or it's trash. Thank you for any help.
Reply:Originally Posted by 7A749Hate to say it, but you may have board issues. Very hard to tell without having it in front of me, but sounds like that or a Diode MOD or SCR issue. You can check the Hall device, but look to the board or rectifier assy for the most likely problem.Just a rough guess. www.industrialelectronics.com is a good place to have your board rebuilt if it ends up being the issue. they are roughly 1/3 of new & carry a 90 day guarantee on their repairs.Here's the Technical Manual. I think it's the right one.https://www.itwwelds.com/miller/serv...D(208230V).pdf