Hi all, I've have had a Bravia KDL-55w829 connected to a HT-CT260 Soundbar through ARC HDMI with no issues for 6 months now but suddenly it has stopped working. The sound started dipping slightly then just went off mid programme. I cant for the life of me get it back working ok. The Soundbar works for Bluetooth and optical. The TV HDMI port works for PS4 etc Therefore the issue either must lie somewhere in the ARC connection.... Can anyone help? It's driving me crazy!