Hi. I had this problem a while ago, turned out to be the screen itself.Possibly could be a graphics problem, but more likely to be a duff screen. If its not in warranty I am sorry but looks like its a new one if its unusable.
Honor 9 Lite review
How Social Media has Propelled Political Graphic Design and Art in the Last Decade
The best kids apps for iPhone & iPad 2018
HomePod d’Apple : date de sortie, prix et fiche technique