no sound in ARC mode
I have a Samsung TV (plasma F8500) and an Onkyo receiver (HT-R390). I have a PS3 going into the game port of the receiver and the out going into the TV. The PS3 audio works fine.
I recently tried enabling ARC mode (to auto) on my receiver and turned the mode on on my television. When I start a program like netflix on the TV I can see the volume go up/down on the TV and receiver when I adjust the volume on the TV remote. When I turn off the TV with the TV remote the receiver also turns off. That all seems to make sense, but the only issue is I get no sound. I'm told my TV needs to be sending a PCM signal, which is the only option in the menu (the other two are disabled--possibly because of the ARC?) and I can see PCM on the display of the receiver.
Are there any steps I can take to debug the missing audio? I purchased an optical cable since my TV has an optical out and my receiver has an optical in, but I don't know how to use that either and my manuals say practically nothing about using one.