Just a little question about TVs.?

Ok, so I work in electronic sales and that's mainly TVs. I've worked for the same company for almost 4 years, and recently came back to electronics. The same manager is there, but not over my department and never has been. Me and her NEVER get along, and probably never will. So when I first started in electronics back in 2012, I was told that at 8:40 to go around and shut off the TVs by remotes, because the breaker is timed to go out shortly after 9 when we close and we risk damaging the TVs if we don't already have them off. First off, is this true?

Because today, I was doing just that and the manager who I don't like came over and I swear will look for something to complain, yell or argue with me about, said that I should not turn off my TVs because we are still open. I informed her that I was told that if the breaker shuts them off, we risk breaking the TV. (I'm not going to be the one to informe the company we broke a 75" Samsung 4K because we allowed the breaker to shut it off) but she yells and insisted that for months we've been telling people not to do that.

Even though there are only 3 of us, and never once have I heard of this deal in the months I've been working in that department.

So before I complain about this situation, I wanted to know if there is a risk involved in allowing the circuit breaker to shut off and turn off are TVs?

It just doesn't seem safe to do such a thing.