I have my HD-DVR - HR21-200 connected to a Samsung LN52A750 and Yamaha RX-V1800 and 1080p is not working. It does work from PS3 though (I tested 1080p 24Hz from the setup menu) connected the same way.
My other system is HD-DVR - HR20-700 and is connected to a Dell 2408WFP (which specs say it...