So I have a cctv surveillance system that was hooked up to the rca component just in the yellow video port. It broke off when I moved the tv. So I bought an adapter from the BNC connector that was on the cable from the cameras to the coaxial input on the tv. Its all hooked up but I cant get the tv to read the signal. The TV is an insignia led hdtv. I tried looking for channel 3 or channel 4 like old tvs but it doesnt seem to find them. Does anyone know how I can fix this so my tv will display the camera feed?