I haven't had any problems on my HR20-700, but my HR21-100 has been having problems over HDMI.
In my case, it only seems to occur during a boot. Each time the box trys to display a different screen the handshaking seems to be lost and I need to switch my A/V receiver to a different input and then back to the one used by the HR21-100 to restore video.
Luckily, after the boot is completed, there don't seem to be any more problems.
I don't recall whether this problem was there with the last NR software, but I have had it with 3 of the last 4 CE's.
You also might want to check your HDMI cable and make sure it is firmly seated. I have had mine come loose occasionaly while installing other equipment.
In my case, it only seems to occur during a boot. Each time the box trys to display a different screen the handshaking seems to be lost and I need to switch my A/V receiver to a different input and then back to the one used by the HR21-100 to restore video.
Luckily, after the boot is completed, there don't seem to be any more problems.
I don't recall whether this problem was there with the last NR software, but I have had it with 3 of the last 4 CE's.
You also might want to check your HDMI cable and make sure it is firmly seated. I have had mine come loose occasionaly while installing other equipment.