I've run optic cable from tv output to optic input of DAC and from DAC analogue (via RCA cables) to analogue amp. Just clicking sounds through speakers. I also tried a different DAC (one from Parts Express) and I get nothing but silence.
Do you know what an OLED TV is?
CNET explains how OLED technology differs from regular TVs, and what you need to know to make the right shopping decision.