This is a new to me machine and was recently installed and working. I started the machine and took photos of the parameter screens, including the hidden parameters. I left the machine for a few minutes, still with the parameters on the screen. When I returned, the CRT was blank, and it looked like it was off. I restarted the machine several times, but the CRT is still dark. The ready light is on. The machine will home and you can change tools with the button. The 100V on the plug on the side of the control is good, but around 97VAC. I looked in the troubleshooting section of the manual, but there is nothing about the screen. Any help would be most appreciated!