7 Ways to Fix Horizontal Lines on TV Screen

Horizontal lines don’t just come up on your TV screen. When they do, it means there’s a problem with something in your TV. These horizontal lines can either appear as wavy lines or straight lines. We’ll help you find the underlying issue and fix it. Yes, fix your display problem within minutes.

The first step to fixing anything is identifying the problem, then the primary cause. The next thing to do is cancel out different possible causes to narrow our search for a cause.

Horizontal Lines on TV Screen Fix
  • Start by testing the picture.
  • Next, confirm if your cables are correctly corrected.
  • Finally, check if your external device isn’t the one acting up.

Related: Fixing pressure damage on a TV screen 

What Causes Horizontal Lines on TV screens?

Horizontal Lines on TV Screen Causes

Here’s an outline of the possible causes of horizontal lines on your TV screen:

  1. Power supply.
  2. Faulty HDMI cable connection.
  3. Panel or processing board issues.
  4. The picture might be too big for the screen.
  5. A bad T-Con board.

How to Fix Horizontal Lines on TV Screens

We will help you troubleshoot the horizontal lines on your TV screen. Let’s look at a few of the solutions you can try out.

Method 1

Perform a Picture Test

  • Change the channel

There’s a possibility the channel you’re viewing is the only one with the issue. Confirm if lines appear in all channels. Try this method first before you go on with other methods, as it might save you the time of checking out other options.

  • Check if the picture format settings for your TV matches your external devices’ settings. For example, if your gaming console is in HDMI 2, your TV should also be in HDMI 2.

A picture test checks your internal component and cable connections to diagnose what’s wrong. Performing a picture test ends guesses because it tells you the type of problem your TV has. So you know precisely the issues to face.

If your TV doesn’t have HDMI, here’s what to do

Method 2

Check your Cable Connections

Faulty cables loosely connected cables not securely fastened to the ports can mess with the signal and cause horizontal lines.

Try the following solutions:

  • Check if you’ve securely fastened cables.
  • Check if the cables are compatible.
  • Replace worn-out cords and cables.

Method 3

External Devices

External devices improve your viewing experience. You use them alongside your appliance; they include a cable box, DVD player, or gaming console.

You can power cycle the external device by turning it off for a few minutes. Plug the cables back into their ports and sockets and turn on the TV. Please make sure you unplug all cables during this process. To be sure if your device is defective, connect other devices with your TV.

Method 4

Tap the Back of your TV

After hours of scouring through popular TV brand communities and discussion forums, we stumbled on this method.

I bet you’re 100% as surprised as we were when we discovered this method. It’s by far the simplest, most straightforward solution. Funny enough, it works!

Fix 1

Let the lines stay for a couple of minutes, then tap the TV part just above the inputs.

Fix 2

  • Remove the back of the TV.
  • Unplug the power cable from its sockets and all other cables linking to the TV.
  • Press each connector firmly into place

Note: This method is not usually a permanent solution, but it always works. It’s perfect if you want a temporary fix.

Method 5

Power Cycle your TV

You can fix the horizontal lines on a TV screen by power-cycling your appliance in these short, easy steps: 

  1. Turn off the TV with the remote.
  2. Unplug the Power cable. Leave the TV switched off for 5 minutes.
  3. Plug the Power cable back in, and reboot the TV.

Method 6

Update TV Software

Do you know that your TV software runs your TV? If your TV firmware is out of date, it might cause all sorts of display problems like horizontal lines and flickers.

Read through your TV’s owner’s manual to find out how to update your TV software. Look at the picture again after you’ve successfully updated it.

Method 7

Factory Reset

Let’s lead you through a TV Factory Reset in these steps:

How to fix horizontal Lines on TV Screen
  1. Go to Settings.
  2. Select General.
  3. Select Reset.
  4. Enter your PIN.
  5. Press Reset.
  6. Click OK to confirm the procedure.

Note: For users that haven’t reset their PIN yet, the default PIN is 0000.

Warning: Performing a factory reset will erase all your data, including customized settings, saved accounts, and downloaded apps. It should be your last resort.

If none of these steps worked, it’s likely a hardware issue or an issue with an internal component. Do not fix it yourself—except you’re an expert—contact the manufacturer or a TV maintenance specialist.

Related: Fix your Samsung TV split-screen 

Frequently Asked Questions

How do I fix the horizontal lines on my Samsung TV screen?

  • Power Cycle your TV.
  • Check all the cable connections.
  • Switch between external devices.
  • Update your TV software.
  • Factory Reset your TV.

How much is the cost of fixing a horizontal line on a TV screen?

Suppose the TV screen got so damaged that the motherboard or control board gets faulty. You would need to replace or repair the TV screen. A rough estimate of the cost should be around $200 to $400.