No, the screen is visibly undamaged. This started happening a year ago and it would go away after awhile. It seemed to get better, but now it's back and been like this for at least 12 hours. If you push the side button or use the pull down you get about 1/8 of an inch of screen on top. I can't unlock it or get in or reboot. I'm waiting for the battery to drain. This time I was outside reading when it happened so sunlight or heat may be a factor.
I can't find any way to contact Samsung to get a repair. The closest authorized service center is a best buy that's a three hour drive. If anyone has an email or phone number that would be awesome. The chat was useless.
i am also experiencing the exact same issue, only worse. the regular screen only lasts about a couple of minutes (max 2) if i'm lucky. The flickering starts on the top right hand corner after that more than half the screen goes a flickering white. Its been about 2 weeks now, with it getting progressively worse. Light and heat definitely triggers it on mine as well.