This started happening to me when I upbraided my internet WIFY from 100 to 200. I might have to update the Tv if TCL or Roku cant update it. I tried messing with all the sound and picture options.
Hey @DLL1
Thanks for the post.
For us to isolate your audio issue, it would be very helpful if you could answer the following questions.
Moreover, if the issue only happens on one channel, removing the channel then adding it back in may help. Make sure to restart your Roku TV before re-installing the channel to ensure the process is successful.
You can visit this Support article for detailed instructions on how to do it: How do I resolve channel playback issues?
Let us know how it goes.
All the best,
Kariza
He!lo...another user here has with the same problem. Its on multiple channels & has been happening for several weeks now. I've even selected the HDMI Auto detect when it was formerly set to PC master do but made no difference; no AV receiver or sound bar either.
Try unplugging the TV for a few minutes. When I turned my tv back on, video and voice was in sync.