Thanks for your kind and helpful reply, in my post i told that non of keys works on the Panel ,i can not ENTER in the TECH MODE,can make COPY or other Function from the PANEL just I can PRINT from the PC.When i turn ON the PANEL shows only TIME at the center of the screen like 11:34 (am) nothing else only the Darkness and the Original Type LED glow green. I hope you understand my question or problem .
THANKS