Abruzini, Jun 6, 2019 : Hello, I have been noticing a problem with the display. It is possible to see darker lines that extend the content in pdf files with tables, for example. (if the table lines are black or in a darker color) It's possible to detect the problem also when a darker image is displayed on the center of the screen and does not fill the entire display. If the image is more colorful it's harder to see/impossible. Also, it is visible mainly between the two sides of the screen, if in portrait mode, or from top to bottom if in landscape mode. Edit: photos from another user (@iacoplus) uploaded to this post.