The company i work for has just recently purchased your TIG 200, we have had great success with it so far, however little time to get fully acquainted with all it has to offer as far as getting the most out of it. However it wasn’t till recently we have had trouble… The connections are all made, gas is on, work is grounded and referring to the quick reference chart has made it easy to provide a starting point as far as settings go to the job we want, but there is a problem. Just as one is about to start the arc and go to town, nothing happens. You hear the foot pedal/ thumb trigger switch, but it doesn’t do anything. no arc, no gas flow nothing. It’s as if something got fried, a fuse or something, but the overload light is not illuminated. What should i do?