Vertical Lines on Laptop Screen: Fixes That Work
Table of contents
Vertical lines on a laptop screen are most often caused by a loose or worn display cable where it passes through the hinge, a failing LCD panel, or a graphics driver problem. The fastest way to tell them apart is to connect an external monitor. If the external screen looks clean, the laptop’s own screen or its cable is at fault. If the lines show up there too, the problem is the graphics driver, the operating system or the graphics chip.
What causes vertical lines on a laptop screen
A laptop screen has the same parts as a desktop monitor, packed into a thin lid. The picture travels from the motherboard to the panel over a thin ribbon cable, usually an eDP (embedded DisplayPort) cable, that runs through one of the hinges. The panel then sends each column of pixels its signal through small driver chips along its edge.
Lines appear when something in that chain breaks:
- Worn or loose display cable. Every time you open and close the lid, the cable flexes. Over years, or after a repair, the wires or the connector can loosen. Lines that flicker or move as the lid moves are the classic sign.
- Failing LCD panel. A weak bond between the panel and a column driver chip gives one or more lines that stay in the same spot. Thin light lines often start this way, as our guide to a faint white line on a monitor explains.
- Pressure on the lid. A pen left on the keyboard when the lid closes, a tight bag or a heavy book on top can damage the panel along one edge.
- Graphics driver or update. A buggy driver or Windows update can draw stripes or glitches into the image.
- Graphics chip fault. Less common, but a failing GPU, or a laptop running very hot, can produce lines on every screen it drives.
Our hub on lines on a monitor covers the other line types, such as horizontal, colored and flickering lines.
Find the cause in five minutes
Three quick checks tell you if the fault is hardware or software.
Connect an external monitor
Plug the laptop into a monitor or TV with HDMI or USB-C, then press Windows key + P and choose Duplicate. If you need a hand with ports and cables, our guide on how to connect a monitor walks through it.
- External screen is clean, laptop screen has lines: the laptop panel or its display cable is the problem.
- Both screens show lines: the graphics driver, Windows or the graphics chip is the problem.
Check the BIOS or startup screen
Restart the laptop and press the setup key as it starts. It is usually F2, F10, F1, Del or Esc depending on the brand. The BIOS (or UEFI) screen loads before Windows and its drivers. If the lines appear there, or on the maker’s logo at startup, the fault is hardware.
Gently tilt the lid
With the laptop on, slowly open and close the lid a little. Do not twist or press on the screen. If the lines appear, vanish or move, the display cable or its connector is the likely cause. Lines that never change with lid position point more to the panel itself.
Run the built-in screen test
Most big laptop makers include a screen test that runs outside Windows. It is the clearest evidence you can bring to support.
- Dell: shut down, hold the D key and press the power button. Dell’s guide on how to run the LCD built-in self-test explains that lines during the color cycle mean the screen needs service. A clean result points to drivers or settings.
- HP: turn the laptop on and press Esc repeatedly until the Startup Menu appears, then press F2 to open HP PC Hardware Diagnostics (UEFI) and choose the display or component test.
- Lenovo, Acer, ASUS and others: look for the hardware diagnostics tool on the support page for your model. Most include a display or LCD test.
- MacBook: run Apple Diagnostics. On Apple silicon, hold the power button until startup options appear, then press Command + D. On Intel Macs, hold D while the Mac starts.
How to fix vertical lines on a laptop screen
Work through these in order. The first few are free and fix the software cases. The later ones are for hardware.
Restart and reset the graphics driver
Do a full restart, not just sleep. Then press Windows key + Ctrl + Shift + B, which restarts the graphics driver. The screen blinks once and the lines may clear.Set the recommended resolution
Open Settings, then System, then Display, and pick the resolution marked Recommended. A non-native resolution or refresh rate can cause odd patterns on some panels.Roll back or update the graphics driver
Right-click Start, open Device Manager, expand Display adapters, open your graphics adapter’s Properties, go to the Driver tab and select Roll Back Driver. Microsoft’s guide to updating and rolling back drivers in Device Manager covers the full steps. If rollback is grayed out, install the latest driver from your laptop maker’s support page.Test in Safe Mode
Hold Shift while you click Restart, then choose Troubleshoot, Advanced options, Startup Settings and Safe Mode. Safe Mode loads a basic display driver. If the lines disappear there, a driver or app is to blame.Update Windows and the BIOS
Install pending Windows updates, then check the laptop maker’s support page for a BIOS or firmware update for your model. Keep the charger plugged in during a BIOS update.Let it cool down
If lines show up only after gaming or long heavy use, clean the vents, use the laptop on a hard surface and see whether the lines stop when it runs cooler.Reseat or replace the display cable
If the lines change with lid position, the display cable is the fix. Reseating the connector or fitting a new cable is a cheap part, but it means opening the screen bezel or the base. Leave it to a repair shop or the maker if you are not used to laptop repairs.Replace the screen panel
If the lines appear in the BIOS and the screen test, stay fixed whatever the lid position, and the external monitor is clean, the panel itself has failed and needs replacing.
Symptom, cause and fix at a glance
| Symptom | Likely cause | Fix |
|---|---|---|
| Lines change when the lid moves | Display cable or connector | Reseat or replace the cable |
| Lines in BIOS and screen test | Panel or cable hardware | Warranty or screen repair |
| Lines on the external monitor too | Driver, Windows or GPU | Roll back driver, Safe Mode |
| Lines started after an update | Graphics driver | Roll back or reinstall driver |
| Lines only when hot | Overheating GPU or loose joint | Clean vents, then service |
| Lines after a drop or a closed-lid squeeze | Pressure damage to the panel | New panel, rarely covered |
Repair or replace the laptop?
A laptop screen with lines is usually worth fixing, as long as the rest of the machine is in good shape. A new display cable is an inexpensive part. A replacement panel for a common 1080p laptop often costs far less than a new laptop, while touch screens, OLED panels and MacBook displays cost a lot more because they come as larger assemblies.
The 50 percent rule is a good guide. If the full repair costs less than half the price of a comparable laptop, repair it. If it costs more, put the money toward a new one. Our ViewSonic monitor repair guide uses the same rule for desktop screens.
Under warranty, contact the maker before anyone opens the laptop, since a third-party repair can void the cover. Have the screen test result, a photo of the lines and the serial number or service tag ready. Panel and cable faults are standard warranty repairs. Cracks, pressure marks and liquid damage normally need an accidental damage plan.
If the repair has to wait, an external monitor keeps the laptop usable in the meantime. For desktop screens with the same symptom, see our guide to vertical lines on a monitor, and for a wider checklist of display faults, the monitor screen issues guide.
Conclusion
Vertical lines on a laptop screen come from the display cable, the panel or the graphics driver. Connect an external monitor and check the BIOS screen first. Lines only on the laptop screen, or in the BIOS, mean hardware, so run the maker’s screen test and claim warranty or price a cable or panel repair. Lines on both screens mean software, so roll back the driver and test in Safe Mode. For more fixes, visit the troubleshooting hub or the full SubInsider monitor knowledge base.
Frequently asked questions
Why do the lines on my laptop screen change when I move the lid?
Moving the lid flexes the display cable that runs through the hinge. If the lines appear, disappear or shift as the screen tilts, the cable or its connector is loose or worn. Replacing the cable or reseating its connector usually fixes it, and both cost much less than a new panel.
Can a software update cause vertical lines on a laptop screen?
Yes. A new graphics driver or a Windows update can bring glitched or striped output on some models. If the lines started after an update and do not appear in the BIOS, roll back the graphics driver in Device Manager or install the version from your laptop maker's support page.
Are vertical lines on a laptop screen covered by warranty?
Usually, if the laptop has no physical damage. Panel and display cable faults are standard warranty repairs. Cracks, pressure marks from a closed lid and liquid damage are normally excluded unless you have an accidental damage plan. Run the maker's built-in screen test first and note the result for support.
Is it worth replacing a laptop screen with vertical lines?
Often, yes. On many laptops a replacement panel costs far less than a new machine, especially for common 1080p screens. Touch screens, OLED panels and MacBook displays cost much more. A useful rule: if the repair costs more than half the price of a comparable laptop, replacing the laptop is the better deal.
Can I keep using a laptop with lines on the screen?
Yes. The lines will not harm the rest of the laptop, and you can work around them with an external monitor. Expect the fault to stay or get worse rather than heal. If the laptop is still under warranty, claim it now, because adding more lines later does not change the repair.