Hi all,

I'm trying to diagnose a problem with my nephew's Miller XMT 350 and am hoping someone on here might be able to give me an idea where to start looking. The welder worked fine when used last then the next time would not turn on. It's wired up 220 Single Phase and has no burnt parts, no burnt smell, or bulged caps. When switched on, I measured 220 on the wires coming out of the switch. I'm thinking a relay maybe, but don't want to start tearing it apart until I have an idea where the problem might be. I have experience fixing TVs and various other types of consumer electronics in my spare time, but I'm no expert. I would appreciate any input.