Quick question. I purchased a K40 last month (December) but it arrived with a cracked tube. The company refunded the cost of a new tube, which was easy to replace. Finally got it fired up, but now it won’t quit lasering. It won’t engrave, it more gouges, even returned home, powered and stayed powered until I pushed the “laser switch” off (defaults to on position, “laser test switch” does nothing). Any ideas or advice what to check/look for or where to go to ask? Users manual doesn’t help, and the seller put me on ignore mode. Any helpful pointers would be appreciated.