Not sure if its a software issue or hardware. I bought the kit through Lightberry. Have their HDMI 4k grabber, RPi3, Audrino board for the LED's. So here my issue. If i set the Apple TV to 1080 mode everything works fine, but if i switch it to 4K mode they no longer function. If i open up Hyperion screen grab the image is black. The apple TV is connected to my Denon AVR then to the grabber, and finally into the TV. Any ideas?