R50e black pixels are now green

[pant]

Hello!
After a few nights of rendering in Photoview360 and later connecting to a projector for few hours my R50e screen started to show all black as green, red as yellow. It is not dependant of how I move the laptop.
When I changed the display mode in fn-F7 menu to leave the projector, the projected image got garbled and rested so until I unplugged the cable. Screen was ok. After travelling in my backpack for a hour and a restart it had green pixels.

It is green from beginning - startup is all green.
Doesn't show on PrintScreen
reinstalled the display drivers

no change.
Is there something to do?