I have a CS8 with a GH4 that runs HDMI out to one of those little $30 boxes to downconvert the signal for my 5.8GHz Tx. Works like a dream. I have a shoot tomorrow and the client wants me to fly the Sony A7. Everything is fine until I run the HDMI into my converter box at which point the screen on the camera slowly blinks off and on and the signal on the monitor end goes from blank to scrambled. I've been through all the menu settings but I guess it's possible that I missed something. Or is the A7 simply not compatible with my setup? Any help greatly appreciated. Thankfully my shoot isn't until late tomorrow so there's still time to figure it out.