My trailblazer has 350 hrs on it at about 275 it started acting up when first starting it. Upon starting, the LED display previously displaying either hours or oil change status would change over to read the amps. Out of the blue, the machine did not display the "on and amps" data and would not weld or generate power either. At first it would run for a few minutes then "turn on" with the proper display and operate (both weld/generate power.) Later, I would have to turn it off & on several times until it would "turn on." As time went on, I would have to run the machine for longer & longer periods of time & it would automatically switch over to "on" --displaying the amps & functioning properly. Once it would go on it would run all day with out repeating the problem even if off for an hour or two at a time. It seemed to act up this way on the first start up. Well recently it has seemingly gotten worse. After being stored for several months, I had to run it for about 45 minutes until it finally would display the amps & operate as it should. Seems like the switch function may be supect, but I have not done a thing to it yet. I have read a lot of threads on this forum I have heard excellent, detailed advice. Any help would be greatly appreciated.