I have a cnc router that I need help with. Totally ignorant on how to check/fix system. Was working fine when I bought it, but had 2 guys "help" me set it up to make parts. Now no work. It has Rhino and Mach3. I'm sure it would be an easy fix for somebody who knows what they are doing, to check operating system and settings. I have the notebook with all the pin settings, but am afraid to screw it up even further.....Any help appreciated. Thanks, Tim.