To be honest. I gave up haha I was told if you hook up the touch screen serial connector to a computer, if you see data inputs while touching screen, then the KTI board and touchscreen are good. Then that means there is something wrong with the software on the CNC not seeing that data. I have yet to find free time to dig into the machine to do this. But it makes sense. All the KTI board/touchscreen does is send inputs to the PC in the cabinet. Theres always a very good chance the PC in the back just isnt seeing those inputs or isnt configured right. Maybe he will chime in here after this post, I forgot his name.