My setup is simple: A Samsung LED 40 inch TV A PS4 A Sony str-dn1080 amp Sky box Inputs - The PS4 and Sky box is plugged into the amp via HDMI Outputs - the TV is plugged into the amp via HDMI. All used to work fine. I recently did a system update on the PS4 and now I'm finding that after a seemingly random amount of time (between 10 and 30 minutes) of watching video on the PS4 (Amazon) the surround sound amp suddenly turns off. When I turn it back on the volume is zeroed. Watching through Sky is fine. I've turned off just about every HDMI/Anynet handshaking setting I can find, and all power saving features, and it's still randomly turning off the amp. Any ideas ?