I received a WhatsApp phone call and the total colour scheme of my screen changed in pastel colours and black and white inverted incl. all pictures and photo’s!
My setting function for background is blokker and enabled so I can not change anything.
Anybody who can advise What, who this happend and what I can do about it?
Are you sure it’s no (contact/HW) problem of your screen which by chance happened when you received your call?
Did you try to reboot?
If that doesn’t help try to start in #dic:safemode ?
My local repair shop resolved the problem simply by pressing a button “reverse colours” in my pulldown menu, which is there apparently for shortsighted people.