I have an iPad 3 and the volume has been going out on the external speakers recently. Like ill be playing music then go and try and open a app and all of a sudden the volume is gone. I p,uh the head phones in and it has sound then I unplug them then no sound. And on the volume slider on the music app the button disappears as well. I tried the side mute switch soft reset powering down then turning it back on to no avail. The first time it happened it jus came back on suddenly and second time I went to restore it an when I plugged it into the computer it cam back on.do you have any idea what's causing this?