It's taken me a while to reply because I don't generally watch that TV. My parents, who are 78 and 82, watch this one. The amount of time the screen goes black is so short that they haven't been able to get the remote and hit the Guide button before the picture comes back again. I was watching with them today and even I wasn't quick enough, but once I pressed the guide button, the whole screen was black, but then the whole guide screen came up. It's hard to tell if it was still black after pressing guide, or if there was just a split second delay when I pressed the guide button. I'll keep trying to catch it at the right time, but I may just swap out the HDMI cable to see if it makes a difference. That seems easier than watching Mom and Dad's TV shows with my finger on the remote.
Thank you