Hi

Ive just replaced my ageing Panasonic Plasma with a Sony 55A80L, Ive connected my home AV system (Yamaha RX-V1065) using an HDMI and the optical audio as per the previous plasma set. 

With the TV set to use external speakers via the Yamaha we get 2 distinct clicks (electrical noise) when changing channel (and other remote operations). Nothing can be heard when using the internal speakers.

 
I’ve been through the audio output menu and changed settings to no avail

So with the same install / cables etc the Panasonic is fine and we get audible clicks from the new Sony

Any ideas ?

We are currently not using the AV system !!