I don’t know what display you are using, so I will just try to help with general info… I have had problems with displays in the past not seeming to work, and what I found in my case was that the display adapter was set to a resolution that the display did not support. I changed the resolution setting to one that the display supported and it started working perfectly. Maybe this is the same problem you are having, maybe not. Without more info, I can’t guess at your problem. I hope that this is helpful.