Well now I dont think its the HDMI because even with a new one the sound on my PS3 seems to only work half the time. But it works fine if I plug it directly into the TV and by pass the AV receiver (sherwood newcastle R-772)This is telling me the HDMI input that might have a problem on my AV. But my xbox 360 works fine with that hdmi input. I hope my new Oppo blu ray does not do the same thing. Has anyone else had problems with bluray sound not working with HDMI or some other problem with the sound?