I have been using my Eastwood tig 200 for almost five years without an issue. I weld just aluminum with it. Last Saturday, it suddenly quit. It seems as though only the high frequency start is working and won’t establish an actual arc. Talked to the tech department and although all the parts are available, no diagnostic information is. Any help in identifying the fault is appreciated. I guess I can order all of the parts and return anything that does fix the welder, I would rather not do that and only replace the failed part. Thank you.