Because that would be way too simple Tim... Thank you very much for the reply. I'll certainly give that a try. I think both my 5D and D90 both have A/V outs. I'm also going to guess that those signals are analog, right? If that's the case, you've solved my problem. I just assumed that it would need conversion. Here's something strange. I attached my GoPro to the HDMI converter and the signal was perfect through the downlink. Back to the D90 and 5D it was the same No signal, NTSC out message with the banded color screen that I posted above. I guess that rules out a defective FF Converter board.