Hi guys, as of today i'm experiencing the same problem.
I did not have any problems before and i haven't made any chances to my system.
Don't really have an idea how to fix this..My Chromecast itself works fine.
Do you have any solutions how to fix this problem?
Changing the Audio profile did not fix anything.
Edit: The video just works fine but it starts off with sound muted in my Videostream player, but turning the volume back to 100 doesn't have any effect on the TV.