Hi, I'm trying to use my Macbook Pro with HDMI through my Denon AVR-2300W Ammp going to a projector but the screen keeps intermittently going to black every second or so. It's not a cable issue as the HDMI works fine directly into the projector - it seems to be a communication issue between the Denon and the Macbook Pro. I've also checked with a mini-display-HDMI cable to the front port on the Denon with no luck too. I've swapped the HDMI input to HDMI 1 (usually 3) to see if that made a difference, but still no luck. Any ideas what could be causing the issue?