Apart from taking it in for repair, the only thing I can think of is to activate the on screen volume icon via pushing the down volume key, then using the onscreen volume to raise the volume...
Is it actually the button that is not moving ? or is it moving but not activating or responding ?
That is good news, and thank you for the tip, I will check for that app myself.
I know the upday app is the main culprit for battery drain, so I always disable that one, but the talk back app I have never heard of, so thanks