I got the sound but no display change. Was watching TVG Classic horse racing. The emergency tone interrupted the audio, but the video samtayes on the horse race. It was very short, but almost double volume of the regular audio.

I don’t have dvd though or any way to recreate it. If it was on longer I’d have grabbed my phone but it was a quick loud series of a low tone followed by tow alternating higher tones twice, and then it stopped. On Verizon Fios in Northern NJ.