how to fix horizontal lines on laptop screen

When your laptop screen has horizontal lines, it can be frustrating and concerning. However, before you start to worry, know that there are effective ways to fix this problem. These lines can ruin your work, entertainment, and overall experience. We’re going to look at the causes of horizontal lines on laptop screens and how to fix them in this guide.

Table of Contents:

  1. Understanding the Causes of Horizontal Lines: 1.1. Loose or Damaged Display Cable 1.2. Graphics Card Issues 1.3. Driver Problems 1.4. Hardware Malfunction
  2. Step-by-Step Troubleshooting Guide: 2.1. Check the Display Cable 2.2. Update Graphics Drivers 2.3. Test the Laptop in Safe Mode 2.4. Perform a System Restore 2.5. External Monitor Test
  3. Preventative Measures to Avoid Recurrence: 3.1. Keep Your Laptop Cool 3.2. Regularly Update Drivers 3.3. Handle Your Laptop with Care 3.4. Use Reliable Surge Protection
  4. When to Seek Professional Help: 4.1. Persistent Horizontal Lines 4.2. Hardware Replacement Needed

Understanding the Causes of Horizontal Lines:

  1. Loose or Damaged Display Cable: A loose or damaged internal display cable can lead to poor connection and result in horizontal lines on the screen.
  2. Graphics Card Issues: Problems with the graphics card, such as overheating or hardware defects, can lead to display anomalies like horizontal lines.
  3. Driver Problems: Outdated or corrupt graphics drivers can cause screen issues, including horizontal lines.
  4. Hardware Malfunction: In some cases, hardware components within the laptop may malfunction, affecting the display quality.

Step-by-Step Troubleshooting Guide:

  1. Check the Display Cable: Open the laptop carefully and ensure the display cable is securely connected to the motherboard and the back of the screen.
  2. Update Graphics Drivers: Visit the laptop manufacturer’s website or the graphics card manufacturer’s website to download and install the latest drivers.
  3. Test the Laptop in Safe Mode: Boot the laptop in Safe Mode to determine if the issue persists. If not, third-party software might be causing the problem.
  4. Perform a System Restore: Roll back your system to a previous point when the display was functioning correctly using System Restore.
  5. External Monitor Test: Connect your laptop to an external monitor. If the lines are not present on the external monitor, the issue is likely with your laptop’s display.

Preventative Measures to Avoid Recurrence:

  1. Keep Your Laptop Cool: Ensure proper ventilation and use a laptop cooling pad to prevent overheating, which can contribute to display issues.
  2. Regularly Update Drivers: Stay on top of driver updates to ensure your laptop’s components are functioning optimally.
  3. Handle Your Laptop with Care: Avoid dropping or mishandling your laptop, as physical impacts can damage internal components.
  4. Use Reliable Surge Protection: Invest in a quality surge protector to safeguard your laptop from electrical surges.

When to Seek Professional Help:

If the horizontal lines persist despite your troubleshooting efforts or if you suspect a hardware malfunction, it’s advisable to seek professional assistance. Attempting complex hardware repairs without proper expertise can lead to further damage.


It’s unnerving to see horizontal lines on a laptop screen, but if you know the cause and what to do, you’ll be able to troubleshoot it. This guide will help you restore your laptop screen to its optimal clarity and give you uninterrupted computing. Just follow the steps, take preventative measures, and know when to get professional help.