no sound, power button failed

[afrances]

One day, my tablet is fine, the next no sound can be played on any app and the power button won't respond. No damage, didn't drop it, etc. Please help!

[Alexander1]

Hi and welcome to the community! Since you're new please be sure that you have checked out our Discussion guidelines.

Sorry to hear about your device. First of all I would suggest that you try to force a power off on your device: 

http://userguide.sonymobile.com/referrer.php?region=global-en&product=xperia-z2-tablet#Resetting-you...

Let it be turned off for a few minutes and try to start the tablet again. 

[Анка]

A similar situation. Sound disappeared and stopped working power button, what to do?

[Lubouk]

I have exactly same problem I tried it with Walkman as you suggested,  but it doesn't help. Reset to the factory settings doesn't help neither.. What should I do? I can see that I'm not alone with the issue so can Sony do something about it? Thx