My in-laws purchased the UHZ-65 last year and I installed it in their home theater, replacing the lamp-powered version of the same projector. It's hooked up to a Denon AVR-X6300H 4K receiver. Everything worked great for a couple of months, but then it stopped working with a 4K signal. By switching the HDMI cable on both devices to the non-4K ports (HDMI1 for the projector), I was able to keep it working with HD signals only. However, now it stopped even doing that. No video signal at all from receiver to projector. If I connect the projector directly to the cable box or Xbox, I get a picture, which makes me think there's a problem with the receiver. My hope is that there's some sort of setting that's causing an incompatibility, rather than a hardware issue. Anyone have any suggestions?