Resolving Error Code 300
I had this issue on mine after a software upgrade. The software had to be lowered to resolve a faulty software load. I am not sure if it was the version was messed up or the copy I had was bad,,, I think it was the version was faulty though..
You remember that when the calibration was successful, power off and not exit on the touch screen window. USE WIHT LIGASURE DOT.