Hi all. I replaced a Sony STR DN1080 with a Yamaha AVR 1070 as I needed the ability to change HDMI sources with the amp turned off. However, I'm having an issue with HDMI output to the projector. I never experienced any dropout with the Sony amp but whichever source I use I'm getting 2 or 3 dropouts close together after anywhere between 90 minutes and 2 hours of running. The projector is using HDMI 2 out from the AV Amp (my TV is using HDMI 1 ARC). I have tried swapping out the HDMI cable (it's 15ft from amp to projector) - changing my expensive optical HDMI to a standard one has made no difference. I'd really like some advice on what to try next, a logical troubleshooting path would be most helpful, thanks.