Hi Emac827,
We appreciate you reaching out to the Roku community!
We recommend unplugging your Roku device from power for a minute and then plugging it back in to see if this clears up the issue. In addition, try replacing the HDMI cable connecting your Roku device to your TV or connect the Roku device to a different HDMI port on your TV.
For more information, see this additional resource: What to do if you do not hear sound from your Roku streaming player.
Please keep us posted, and we'll continue assisting you from there.
All the best,
Chel