My VDT (Video Display Terminal, Wyse55ES) connected to Commdial-Intouch (KH 128) does not display anything but a blinking cursor. It used to work well for 4 years. I tried password ctrl+shift_XXXXXXX but it didn't do anything. I also tried to setup the VDT (shift+setup key), but don't know what to change. Actually I don't know if my problem is because of setup or not. Any help please!

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