horizontal lines across my laptop screen

Thin coloured lines appeared across the display a couple of days ago. They don't show on a screenshot and they're not there when I plug into an external monitor. Updated the display driver, no change. Is it the screen itself or the cable?
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1 Answer

alex_7 Nov 04, 2026
deepak_setup
Plug it into a TV or monitor. If the external screen is clean, the problem is the laptop panel or the cable running up through the hinge. Try slowly moving the lid back and forth too, if the lines flicker or change as you move it, it's almost certainly that cable, which is a cheap part. If the lines also show on the external display, it's the graphics side, and then a driver reinstall is worth trying. Lines that show up on the BIOS screen as well rule out drivers completely.