Bravia XR- 55A9 /No sound throgh TV Speakers

[pauluscfc]

Hi, Could I ask the Sony community a question before I contact the live help? 
My Bravia XR - 55A9xl  has suddenly stopped outputting any system or tv sounds. 

I have removed all HDMI's and tried the playing Netflix from the home screen to rule out any external devices but no luck. 

I've also tried a reststart and full power off. 

Fortunatley I have it connected to a Sony TA- AN1000 so I can use this for sound for now, but I still need a fix for the TV speakers. 

Any suggestions would be most welcome.