I have a brand new pair of Fatshark Dominator V3 goggles and am having trouble receiving a signal. I know my video transmitting system is working because I plugged the Fatshark AV cable from the external receiver into my tv and was able to get some video. However, when plugged into the goggles, all I get is grey screen, no matter what input setting is selected or what position the "RX" switch is in. I also connected the goggles directly to my xbox with the supplied HDMI cable and was able to receive video that way, just cant get it to work with the RCA cable. I was thinking that maybe the "rx" switch isn't working properly, and is stuck on internal rx, but if that was the case, not sure why I would get signal with an HDMI cable. Any help would be appreciated. Thanks!