We have a older welder early 90s we can not get it to tune get an error message saying insufficient P,O, and it stops the welding process and the horn returns to the start position. can you help us to find out what the problem is and get it running again are at least a ball park cost it is an old welder and the owner does not want to put a lot of money back in to this machine but on the other hand i have a customer who want parts. please feel free to call me the co. is Quashnick tool in Lodi ca. 95240. the only number I can find on the welder that might mean something to you is number 50224 type 1215 please let me know if you need more information and i will try to find it for you thanks.