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What Causes Horizontal Lines on the TV Screen – Explained

what causes horizontal lines on TV

So, your TV is showing some unusual, horizontal lines on the screen. This can be frustrating and you might be wondering what exactly is causing horizontal lines on your TV screen. 

Well, these lines typically are a result of things like loose cables, signal interference, or sometimes even hardware malfunctions like a faulty display panel or T-Con board. The good news is that many of these problems can be fixed by checking connections, adjusting settings, or, in some cases, replacing faulty components.

 In this guide, we’ll explore the specific causes of these horizontal lines and walk you through the steps you can take to fix them.

Why is my TV Screen Showing Lines?

Let’s face it, seeing lines on your TV screen is annoying and it seriously disrupts the viewing experience. These lines could be vertical, horizontal, or even just a single line across the TV screen. 

What causes horizontal lines to appear on the TV screen can be a myriad of reasons, like loose cables, signal issues, or something more serious like a damaged display panel. Understanding the root cause of the problem your TV is having is step one towards fixing it. 

5 Causes of Horizontal Lines on the TV Screen

1. Loose or Damaged Cables

damaged TV cables

One of the most common reasons for horizontal lines on the TV screen is loose or damaged cables. If the connection between your TV and the external device (like a cable box or a game console) is unstable, you might notice lines on the TV screen. Simply unplugging and securely reconnecting the cables often fixes this problem.

2. Overheating

TV remote

TVs generate heat, and when they overheat, it can cause problems like horizontal lines on the screen. Make sure your TV has proper ventilation and is not in an area that traps heat. Moreover, dust can clog the vents, so keep your TV clean.

3. Faulty Input Source or Peripherals

TV device

Sometimes, lines on the TV screen are caused by the devices connected to it, for example, a gaming console. If these devices are faulty or not compatible with your TV, they might send a poor signal to your TV, causing lines to appear on the screen. You can identify this issue by testing it out with another device. 

4. Magnetic Interference

TV and electronic devices

Oftentimes, other electronic devices near your TV can cause magnetic interference, which can cause horizontal lines on a TV screen. Although this is less common with modern TVs, it can still happen. Try moving devices like speakers, routers, or anything else that might give off a magnetic field away from the TV to see if it helps.

5. Defective T-Con Board or Display Panel

Netflix on TV

The T-Con board is essentially responsible for controlling the pixels on your screen. If it malfunctions, it can cause horizontal lines to appear on your HED LED display. Also, a damaged display panel can also cause lines. If this is the issue, your TV will most likely require professional help or a replacement. 

How to Fix Horizontal Lines on my TV Screen

fixing TV

If you’re wondering how to fix your TV screen by yourself at home, you can try some of these step-by-step solutions and see if any of them work out for you. 

1. Check and Reconnect Cables

You can start by making sure all cables are securely connected. Unplug the cables, then plug them back in firmly. If the problem continues, try using a different cable or input port. If you notice any damaged cables, remove them and replace them. 

2. Power Cycle the TV

Sometimes, a simple reset can clear the lines on your TV screen. Try turning your TV off and on again. This works in clearing temporary glitches and other display problems in a TV.

3. Update your TV’s Firmware

Outdated firmware can sometimes cause display issues, like horizontal lines on the TV screen. Go to your TV’s settings and check to see if there are any available updates. If there is an update available, install it and see if it fixes the issue. 

4. Perform a Display Test

Go into your TV’s settings and check if there’s an option to run a display test (many modern TVs have this). This can help identify if any software issues might be causing the lines. You can also try changing the resolution settings to see if it makes a difference. 

5. Factory Reset

If nothing else works, a good, old factory reset will likely do the trick. But be careful though, as this will wipe all your custom settings and reset your TV to its factory settings. So, it’s better to use this as your last resort. 

Conclusion: Still, have Horizontal Lines on your TV Screen? 

If you’ve tried all these methods and the lines on your TV screen are still there, it might be time to call in a professional. Sometimes, the issue (and the fix) are beyond simple DIY fixes and are a bit more complex, like T-Con board or display panel issues. Call a repairer to get rid of horizontal lines on your TV screen.

FAQs

How do I fix horizontal lines on my TV?

To fix horizontal lines on a TV screen, try power cycling the TV, checking cable connections, using different input ports, and running a display test. If these don’t work, try doing a factory reset. If that doesn’t work either, seek professional help. 

What causes vertical lines on a TV screen?

The causes for vertical lines are about the same as horizontal lines: loose cables, a faulty T-Con board, defective display panel, overheating, magnetic interference, etc. 

How much does it cost to fix horizontal lines on TV?

In the UK, repairing horizontal lines on a TV usually costs between £80 to £300, depending on the nature of the problem. The bigger the issue, the higher the cost. 

What do horizontal lines on the screen mean?

Horizontal lines on the TV screen typically mean there are issues with the TV’s internal connections, like the T-Con board or the display panel. They can also just mean you have loose cables or faulty devices attached to your TV.

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