ComputerDok – Computer Tips, Windows Guides, & Tech Tutorials

On ComputerDok , we get a lot of readers asking about horizontal lines on the laptop screen in Windows 10 and Windows 11 . These lines can be caused by anything from outdated graphics drivers and wrong display settings to a loose display cable or a failing LCD panel. In this guide, you'll get a clear, step-by-step plan to diagnose and fix horizontal lines on your laptop display—starting with simple software checks, then moving to hardware troubleshooting only if needed. In this guide Quick Diagnosis: Hardware or Software? Software Fixes for Horizontal Lines Hardware Checks & Fixes When to Repair or Replace the Screen FAQ: Horizontal Lines on Laptop Screen Quick Diagnosis: Hardware or Software? Before trying fixes, run these two quick checks to understand whether your laptop display horizontal lines are likely hardware or software related. 1. External Monitor Test Connect your laptop to an external monitor or TV usin...