Lincoln Precision TIG 375 Troubleshoot Help Request, Doesn't Weld in TIG Mode

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I have a Lincoln Precision TIG 375. K1903-1, Code10809-4, Ser# U1070607160. It welds fine in stick mode but just makes a tiny spark in tig mode. I have tested the foot amptrol for continuity at the proper pins and for potentiometer function at the proper pins. I feel that the amptrol is operating properly. The Lincoln owner’s manual, troubleshooting section it indicates that it is more likely PC board.Are there further tests that I could make?Is there a legit PC board repair service available? A new board is $1568.00. I don't have a problem installing a brand-new Lincoln board for that price but I hate to do that and then still have the problem. More than likely a new board would fix it but have reservations.Are there others here who have experienced the same issue that can comment or make suggestions? Thank you, Kirk Trekell, residing in the heat of NW Oklahoma.
Reply:have you tried lincoln directly or a authorized repair shop ? when i was in the LWS the other day they had two lincolns on the floor with repair tags. mp210 and the other i think was tig200. i asked what was wrong with them but they gave really just a vague answerinvertig 221 water cooledhypertherm powermax 30xpfronius transpocket 180fronius transsteel 2200fronius iwave 230i water cooled
Reply:

Originally Posted by cornchip

have you tried lincoln directly or a authorized repair shop ? when i was in the LWS the other day they had two lincolns on the floor with repair tags. mp210 and the other i think was tig200. i asked what was wrong with them but they gave really just a vague answer
Reply:i wonder if lincoln has a refurbished board they could send just to test your machine and see if thats the problem $1500 is alot if that doesnt fix itinvertig 221 water cooledhypertherm powermax 30xpfronius transpocket 180fronius transsteel 2200fronius iwave 230i water cooled
Reply:

Originally Posted by cornchip

i wonder if lincoln has a refurbished board they could send just to test your machine and see if thats the problem $1500 is alot if that doesnt fix it
Reply:

Originally Posted by cornchip

i wonder if lincoln has a refurbished board they could send just to test your machine and see if thats the problem $1500 is alot if that doesnt fix it