I was in the middle of a job, all of a sudden the Control panel went blank and the laser stopped. The light still works, the fan still works, no power to the control panel, when I looked at the laser power supply box, the red light and yellow light is on but the green light is not on. I checked the fuses in the power supply plug in and they look ok, was hoping it was just a fuse. Any thoughts of what to do next if it is not the fuse? **LCD Screen