Hi, I am having trouble with sound with my Yamaha RX-A2040 sound in Zone 2. When Zone 1 and Zone 2 are playing the same source together (Sky, DVD) the sound works fine. So let's say both Zones have Sky on. When Zone 1 changes source, let's say from Sky to DVD, the sound in Zone 2 goes silent. The same applies if you change to Net Audio or Apple TV. It seems after a while of changeling sources several times the sound in Zone 2 will work when Zone 1 is playing a different source but then it will stop if you for example turn off all the sources and start again. Also Zone 2 will not play sound on Sky or DVD if Zone 1 is switched off. If Party Mode is switched on then you will get sound in all 3 zones but this is not problem here. Several things have been tried with Yamaha technical support and also the amp has been exchanged but still no joy. Does anyone have any suggestions or has experienced the same problem?