Xperia Z2 tablet sound has suddenly stopped working

[JohnBlackwell]

I've had my Xperia Z2 tablet for a year and the sound has just stopped working.

No matter what I try to adjust in the Settings.  I've also tried a full factory reset but nothing seems to make any difference.

Does anyone have ideas about how to fix this problem?

[Thommo]

Sorry to hear this but you would need to either return your device to the place of purchase or contact Xperia care and have your device inspected as this sounds like a hardware issue if after a factory reset it still fails to work http://www.sonymobile.com/global-en/support/contact-us/

[SergioPL1]

Have you tried bluetooth audio or headphones? Are they working? Maybe headphones detector in headphones jack got stuck. Try to insert headphone cable and remove it from jack and try again.

[JohnBlackwell]

Hi Sergio,

Thanks for the suggestion, I tried the headphone jack at the outset of the problem but with no joy - there was no sound through the headphones.

I've also tried disabling Bluetooth but this made no difference.

What's strange is the sound 'switched off' after a series of upgrades but I've not been able to identify any specific source.