A photo doesn't show too much, the videos in my first post are better. In any case, here's one. It shows the gray line at the bottom, what it doesn't show is that when the gray line appears, the picture shifts upward. This is a constant cycle, it does it for a second or 2, then stops, then again. It's like a pulse....

Just a quick update on this, I replaced the T-con board. Same issue, didn’t make it any better at all. After it warms up for 45 minutes or so it ends up with a jumping screen and a gray line at the bottom. I’ve ordered a new main board, that’s my last shot. Then I’ll call it dead if that doesn’t work.

5.5 year old 85 inch Sony Bravia X950G started showing gray horizontal lines across the bottom of the screen and the picture shifts slightly vertically when it happens. The lines sometimes get bigger/smaller vertically and bounce back. See the video for the problem. It seems to be happening after it warms up after an hour or so. Happens regardless of source. Right now there's nothing but power cable connected and it's happening. We did hook up a new Nintendo Switch to our HDMI switching receiver today, and played for a while with no issues, but this problem didn't occur til a few hours later while...