Screen is Bright WHITE with a big VERTICAl band of FADED GREEN

My iPhone X suddenly developed this problem yesterday. It’s screen is ALWAYS lit bright white with a tinge of green in the middle band. It seems to function normally otherwise: 1) power save mode 2) receives calls, 3) seems to react to the touch screen (as long as I know where I am touching), but the screen is ALWAYS bright white.

I have done hard reboot but of no avail.

The ONLY way it works is if I can get it to the LOWEST brightness which I was miraculously able to do. So I cant see the contents well, but since I use the “dark mode” by default, I am able to ready/navigate the screen. But the moment I change teh brightness to be even a NOTCH higher than MINIMUM setting, the problem comes back.