I have just purchased a Samsung SMART TV and lo and behold, it does not have a AUX out. Therefore I am at present unable to connect my loop system.
On speaking to Samsung, they advised that AUX is old hat and therefore do no provide for it. Strange as I know quite a lot of people who use it.
Anyway, for those who have come across this problem, the solution on my part was to purchase of Amazon a-
Portta HDMI Switch Switcher 4 Port 1 Out 4x1 V1.3 this has various input and outputs and is fairly cheap.
I hope this helps.
I had the same problem. The old Samsung had a headphone out, which was useful. I got over the problem with an optical to RCA converter, but had two dud ones first.