For whatever reason my Sammy 46" tv 2014 vintage seems not to be outputting sound from the phono AV outputs.

I've changed the speaker output from TV to external, or however it's worded, but nothing!

Never had a problem when I was using it through my AV amp via HDMI, but to make my life easier, and to appease the wife, and to stop her calling me up when I'm on a gig,saying she can't get the tele on, ive tried to simplify the whole operation, but I'm not happy with the built in speakers on the TV, hence wanting to use the stereo amp.