Hi, I recently purchased a CnM 7" dual core tablet to replace my broken Nexus 7. I bought a mini hdmi to hdmi adapter from amazon, and when I connect to my tv it works perfectly, but in my living room I have a projector and surround sound system instead of a tv. When I use my laptop I plug the hdmi cable to the laptop and projector, and a 3.5mm audio lead from the laptop line out to the surround sound system. If I try to use my tablet in the living room, the sound cuts out when I plug in the HDMI, I phoned CnM support earlier and was told it may be a faulty tablet and to try a factory reset. I did this to no avail, but it doesn't seem like a fault, as when it is connected to a tv, you wouldn't want the sound playing on the tv and the tablet at the same time. So is there a way to enable the sound from the headphone socket when using the HDMI out, and also is there a way of switching off the tablet screen when it is displaying via HDMI out? Or ar both these issues with the tablet rather than android?