In the Charleston SC area they have changed the way they run the red ribbon for a weather warnings or weather test on your TV When the ribbon starts to run it kills the sound. The sound is gone as long as the ribbon runs and it takes several minutes for the sound to return after the ribbon is gone. I realize the ribbon warnings may be important but the sound kill is really stupid especially for the several minutes after it is gone. I know I could turn on the captions or pause the picture but should not have to do that.
You can't do anything with that warning. It is used for Amber Alerts and bad weather. This is an FCC mandate. However, your sound should be returning no later than thirty seconds after the ribbon is gone. Even less than that. If no sound comes back after the warning is gone, wait for a few minutes, than reboot your box.
I would contact Spectrum about why there is such a noted delay with the sound coming back after the warning is gone. What is your zip code in Charleston, South Carolina?
29576 but we get the Charleston DMA feed
If the sound goes out after the banner is gone for more than 30 seconds, wait for five minutes, power of both the TV and box and unplug the box. Plug the box back in and wait for the reboot to finish.
If this happens again after the reboot advice, you will need to contact Spectrum. Tell them you did a cold reboot. That sound is going out for several minutes following an FCC alert on the screen. Give them your account information, and request a support ticket be opened for your areas' zip code. This sounds like a head-end issue.