I recently upgraded my AV to the new Onkyo 646 and have encountered an issue. My HDR is connected via HDMI to the Onkyo the day I connected it all up and changed the HDR to E4 the sound went very loud and mixed the programme with a high pitch white noise. Changing the channel resolved this. A few days later I was watching a recording and when I stopped to delete it the same issue happened. Assuming it was an issue with the AV I contacted Onkyo who suggested a hard reboot. I first changed the HDMI cable but had the same issue and then did the reboot. This worked for 5 days then the same issue happened. I then took the AV back and got a replacement. Set this up yesterday and guess what, happened again.
I now suspect its the HDR causing the issue as there is no reports of this Onkyo defect. The replacement is from a different batch so has anyone got any other ideas?