Check first to see your TV does indeed work for video on other sources such as the menus for example to eliminate an entire system picture problem. Also make sure to check the seemingly simple things such as all the wires are plugged in correctly to their matching colors. You would be surprised st how many people struggle on simple steps such as above for hours even before realizing the issue! Assuming that wasn't the problem, could you describe your issue in more detail? It can be very difficult to diagnose someone's technical issue over the internet with a delayed response chat such as this one. Perhaps check to see that the content of your video you want to pass through the cables is supported through those such as how new HDMI cables had to be introduced when 4k video content came out because the older cables could not support them.