this seems to be a common issue, but aside from a couple of posts inside the various Denon AVR model owner's threads, I can't seem to find a clear answer what to do.
I own a Denon AVR 2313 (in Europe, it's different from the 2313Ci known in America and Canada) and use to have the following issue: when using Airplay, the screen would start flickering, flashing green. Sound would stutter too and eventually, in the worst case, the connection would be broken down. When i reset my avr, the problem was gone for a while.
As of yesterday, I installed a firmware update. I watched some tv in bed, setting the sleep timer on my avr, tv and digital tv box. This tv box is connected to my avr by hdmi, and of course the avr is also connected to the tv by hdmi.
Now, when I woke up, the tv was still playing "trough" my avr, but my avr was asleep (a red light above the power button). I don't know how the signal can get from my tv box to my tv without the avr being on. Also, I was unable to get it back on, so I had to cut the power. After doing that, it would act normally again.
A couple of minutes ago, the screen started flashing green again, this time it eventually stayed green, but the sound kept playing. Switching channels didn't make it go away, I didn't even have video ouputs on other hdmi ins. So i turned it off again, only to find that once again, i could'nt turn it on again.
Researching the internet forums, it seems that this issuy is quite common for airplay and other inputs. Does anyone know what to do? I only bought it two months ago, should I ask for a new avr?