Already had tried that. Maybe I have a bad DAC. The DAC I have has two outputs for the powered speakers, one Optical and one coax. I know the coax connection works cause my previous tv had it and it worked with it.
You ever get this figured out? I'm running into the same issue. I have a Bose Solo 5 connected to my TCL 55S425 Roku TV. It only has AUX, Optical and Coaxial for TV Inputs. I have the Optical connected and get no sound. Any thoughts?
I was running optical out from TCL to Analog to Digital Converter, Converter to RCA receiver, working fine 2 days ago. Stopped working, so I replaced the converter and Toslink cord to no avail. Anyone got anything on this? There is no HDMI connected. Im baffled that this worked wonderfully a few days ago, and no longer works.
Thanks for this reply. I had a similar issue that had me panic and I almost thought I had to buy a new tv but switching the audio settings from auto detect to SPDIF worked now I have audio through my optical cable woohoo you rock!!!!!