I recently bought a Miller Trailblazer Pro 350D with a Kubota diesel and 714 hours, along with other items that I bought together as a lot.After I brought it home, I noticed a tag on the welder saying "BROKE".
While a disappointment, I reasoned that1) the seller, a demolition man, was not aware of this tag, as he would either remove it if he was dishonest, or tell me about it if he was honest. 2) The welder likely was not worked on, as the tag would have been more specific if someone looked at it more closely.
What was going on with it is that it would start and run great, but would produce no output, AC or welding current.
A bit of diagnostics with a multimeter, and staying on the miller forum and calling Miller, all pointed to a bad circuit board. I took a bit of risk and bought a replacement from Miller for $500 plus tax.
The result is great, the welder, now, runs great and welds pretty good.
Apparently, that board was poorly designed, and dies for spurious reasons, like when someone tries to jump start a dead battery.i