I have a Sony Bravia TV and Sonos Arc and Sub Woofer Mini and unable to get any sound from Audio System

Are you saying it’s stopped working after 6 months or that it never worked?

What model tv?

It worked previously for the past six months, then I moved locations and reconnected the same as before and now doesn’t work

Sony Bravia XR 75X9xK

Using new HDMI cables same as before

Not getting any sound from my Sonos Audio System

Internal TV audio switched off

All setup with internet connection

All updates have been loaded

Check the audio settings on the tv. They may have reset after an update to the tv? Looks like you need 

Audio output -eARC mode - Auto

Select - Speakers - Audio system

eARC enabled

It may also be worth a full power off reset of tv and speakers, and checking the cables are correctly seated. 

Thank you

Will do

What about “Audio System Prioritisation” mode?

“Output sound from Bravia Sync compatible external speakers if detecred when TV is oowered on”

Do I click this one in “On” mode?

“Output sound from Bravia Sync compatible external speakers if detected when TV is powered on”

Obvious answer is: same as when you set it up and had it working previously. Try with and without.