This seems like it might have an easy answer - but I'm asking anyway as it's confused the hell out of me! I have my Sky+ HD box connected to my Samsung T220HD via an HDMI cable. I don't use the TV for the audio output, instead using a set of good quality phono leads, it's connected to the back of my Denon RCD-M38DAB unit. I've just had a new PC - which means the old one is now connected to Samsung TV mentioned above via a DVI cable. Okay, the problem is this. If I have the HDMI channel on the TV with Sky showing - the audio comes out of the Denon unit fine. If I then switch the TV to the DVI channel, the audio from Sky stops coming out of the Denon unit. I have no idea why - because the Sky box audio is connected to the Denon independently of the TV - so how does changing the source on the TV stop sound coming out of the stereo? The TV isn't connected to the stereo in any way at all. I'm completely confused and have no idea how the two things are related! Can anyone give me an easy answer - and possibly make me feel stupid in the process?!