Vertical and horizontal lines

[Darragh1]

My laptop worked fine this morning, this afternoon I turn it on and the screen is just black and white, very fine horizontal and vertical lines. No windows splash screen etc...No drops or spills.

 

[Prostar Computer]

If those lines fluctuate when you pivot the screen, it's the video cable, which may need reseated (or reconnected, if you prefer), or replaced altogether. There's a slimmer chance, but still possible, that the LCD screen itself is bad and needs replaced.