I have a Hobart Airforce 400 that quit working. When I try to use it it doesnt shoot fire and the cup light blinks. I took it to the local welding shop that sells and repairs them and they had one they used as a parts machine to eliminate parts on mine. They told me mine needs a new PC board and it would cost over $700 for the part and labor. Can anybody help? If I could get the part I am sure I could replace it myself. I have had the machine apart when I bought it from a friend it needed a new filter in it and I replaced that with no troubles. It didnt look like it is to complicated to work on. Any suggestions?

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