I'm having the same problem on my Visio tv with Dish tv. Yesterday it worked...todayy, no sound.
Moderator Edit: Changing title for clarity
Hi @derby1! Thanks for posting to community.
I've enabled a trace on your account to help investigate and I'd like to start with some troubleshooting.
First make sure your device has the latest firmware by checking for a new update. If an update is available, try loading Pandora again once the update is complete.
If you're still having the same problem, then please try a few standard network troubleshooting steps:
You can also contact the manufacturer directly to troubleshoot your specific device and settings.
Let me know how it goes.