How to fix a black line on your HP laptop screen

Out of nowhere, a strange black line appears on your HP® laptop. Before you can tell what’s happening, it spreads across the screen. Now you can’t focus.

Sounds like game over for your machine, right? Not at all. Helping you take care of your favorite tech is what we do at Asurion. We work on everything from a HP laptop stuck on the loading screen to complex HP repairs. Here’s how to repair a black line on your HP laptop screen.

Common causes of black lines on HP laptop screens

One of these likely caused the screen glitch you’re seeing:

• Physical damage. Have you dropped your laptop or exposed it to heavy pressure lately? Cracks, pressure marks, or other visible physical damage are known to distort the pixels on your screen and create lines.
• Loose or damaged display cables. Display cables are responsible for connecting your laptop’s screen to the motherboard. If these cables are loose or faulty, graphical issues might happen.
• Graphics card issues. A GPU, which stands for graphics processing unit, renders the imaging on your screen. An issue with the GPU could cause laptop display flickering or, worse, an ominous black line that won’t go away.
• Software or driver glitches. Even a minor software issue can trigger a black line on your HP laptop screen. Outdated or corrupted graphical drivers are the likely culprit. Check out our guide on how to update computer drivers.
• Overheating. You can tell that overheating is the problem if you see constant flickering. This often happens when you use your laptop for a long time without proper cooling.

Quick fixes for black lines on your HP laptop screen

The question of how to fix black horizontal or vertical lines on your HP laptop often comes down to simple DIY fixes.

Check the screen for physical damage

While holding your laptop at various angles, look closely at the screen. Are there any visible cracks or dents? If there are, you should have your screen professionally repaired.

Restart your laptop

Sometimes, a simple restart is all you need to get rid of pesky monitor lines. A restart will return your laptop's settings to its normal state. Our restart HP laptop guide should make this easy to execute.

Test with an external monitor

You may need to determine whether the issue is with your laptop’s GPU or the screen itself. Using the appropriate cable, connect your laptop to an external monitor. If the black lines don’t appear, the problem is likely with your laptop screen. 

Spotting the dreaded black lines on the external monitor too? It's likely the issue is related to the graphics card or driver.

Update your graphics drivers

Sounds complicated, right? It’s not. Updating drivers is a simple fix that can address problems like pixel distortion or intermittent screen issues.

How to update drivers through Windows Device Manager

• Navigate to the Start menu and right-click on it. From there, select Device Manager.
• Expand the Display adapters sections. Then, right-click on your GPU.
• Click Update driver. Next, choose Search automatically. 
• To install the latest drivers, carefully follow the on-screen instructions.

Having a hard time? That’s what professional HP repair specialists are for.

Reset display settings

If nothing else works, try this:

• Right-click on the desktop.
• Select Display settings.
• Navigate to Advanced display settings.
• Reset the display settings back to default and check if the lines disappear.

FAQ

Why does my HP laptop have a black line on the screen?

A black line on your HP laptop screen could be caused by a loose display cable, a faulty graphics driver, incorrect screen resolution settings, or physical damage to the screen.

Can a black line on my laptop screen be fixed without replacing the screen?

Yes. If the issue is software-related—such as a driver problem or incorrect resolution settings—you can fix it without replacing the screen. However, if there’s physical damage, a screen replacement may be necessary.

What if the black line appears only sometimes?

If the black line flickers or appears intermittently, it could be due to a loose cable, overheating, or a failing display panel. Try gently pressing the edges of the screen—if the line moves, a cable might be loose inside.

How much does it cost to fix a black line on an HP laptop screen?

The cost depends on the cause. Software fixes can be DIY, but an HP screen replacement typically costs between $100–$300, depending on the model. If your laptop is under warranty, the repair may be covered.