I have a Sony STR DH820 for my central hub. I use a computer as a media server. The receiver is used for music, TV, and movies. When I feed video/audi through HDMI to the receiver and to the TV, there is no audio unless I first turn the TV on. If I'm watching a movie this is fine, but for music it's a nuisance. Once audi has come on, I can turn the TV off without a problem. If I run audio via optical there are no problems, other than my onboard audio processor does not support 5.1 surround.
Sony technical support has been of no help. Does anyone on here have any suggestions?
I'm not much help either. Sounds like a weird HDMI handshaking issue that is being solved by the TV being on. The video card on the PC isn't being satified without a video source at the other end. Since it is the source, it isn't allowing certain functionality until it finds a video sink (TV) at the other end.