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Fix LG TV Horizontal Lines on Screen(+CAUSES)

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Have you noticed horizontal lines on your LG TV? 

If yes then you are not alone. Many LG TV owners have complained about this problem.

Have you tried finding a solution on the internet and found that you can’t fix this problem? 

If you are seeking a solution to your TV’s horizontal lines then this guide can help. This guide will help you eliminate those LG TV horizontal lines on the screen.

Why Should you Trust Me? Hi, I am Anirban Saha, an Engineer with a Specialization in Electronics and Communication Engineering. I have experience with electronic circuits and computer peripherals.

Let’s get started!

What causes horizontal lines in LG Smart TV?

LG TV Horizontal Lines on Screen

LG Smart TVs are known for their picture quality. However, some users have been reporting that they are experiencing horizontal lines on the screen. 

So what could be causing this issue?

There are several possible reasons for the appearance of horizontal lines on an LG Smart TV:

1. Input Cable Issue

One possibility is that the issue is caused by a loose or damaged HDMI cable.

The input cable connection issue is a common problem that can be easily resolved by checking the input HDMI cable connection.

To check the input cable connection, check that the input cable is connected to the correct input port. 

If the issue still happens, try to reconnect the input cable to the correct input HDMI port. If the issue still happens, try another input port. 

If the issue is still happening, try to connect another device to the input port to rule out the input port as the cause of the issue.

If the issue is still happening, service may be required.

2. Old Firmware Version

Another possibility is that there is an issue with the TV’s software. If there is an issue with the software, it can cause horizontal lines to appear on the screen.

Updating your TV’s firmware version should be done when there is a software update available.

A software update can include several fixes and improvements, which will improve your TV’s performance. 

If you’re experiencing horizontal lines or other image problems, a software update may help you solve the problem. 

3. TV Panel Issue

Another common cause is a problem with the TV panel. If there is a problem with the hardware, it can also cause horizontal lines to appear on the screen.

A panel issue is related to the screen of your TV. If your screen has suffered physical damage, you should take it to a technician for repair. 

If you have a new TV, the screen maybe is just dirty or dusty.

Still, you need the help of a technician as you won’t be able to peek into the panel yourself and it is also not recommended to do it on your own.

Types of Horizontal Lines that can occur on LG Smart TV

Lines that can appear on your TV can be horizontal lines running horizontally across your TV’s width or they can be colored vertical lines running vertically on your LG TVs’ display screen.

Horizontal lines in LG Smart TVs can be of several types which are commonly seen in their TVs. These are one of the most commonly seen other tv screen problems.

These can occur in any LG Tv whether it is an LCD TV, LED TV, OLED TV, or QLED TV.

1. Horizontal green lines on the LG TV screen

The green lines on LG smart Tv screen are a common issue where the screen displays a green line on the sides of the screen. 

These lines usually appear on the top and bottom of the display and are caused by a faulty or damaged panel of your screen.

However, to conclude whether it is a panel issue you need to first check with the troubleshooting steps to fix it. 

If it is a panel issue, then the problem with remain until you replace the panel of your LG LED TV.

2. Horizontal black lines on LG TV screen

Horizontal Black lines occur in thin strips mostly on the bottom or top of the screen of LED TVs. 

It can be in the form of a block of lines or a single line. Most of the time these are dead pixels or any other defect. 

When a horizontal line appears on the screen of your LG TV, it can be either a problem with your TV, or it can be a problem with your cable or satellite box.

If the horizontal lines are not caused by the cable or satellite box, then the problem is with your LG TV. A black horizontal line is not always a panel issue.

Typically, this can be caused by a bad pixel or a bad connection on the screen.

Fix LG TV Horizontal Lines on Screen 

There are several ways to troubleshoot and fix Horizontal Lines on LG TV’s screen. 

#1. Verify the Lines are Permanent or Moving on LG TV

The first thing to do is to determine if the lines are a permanent part of the LED or LCD screen or if they are moving. 

If they are permanent, then it’s a hardware (LCD) problem, so you’ll need to contact LG or take your set to a TV repair center. 

If the lines are moving, then it’s a software (Firmware) problem and you can use the following steps to fix these lines.

#2. Perform Picture Test Switching Input Source

Before you start to fix LG TV Horizontal Lines on Screen, you will want to run a picture test.

Your input source to your Tv might be having issues. You can switch your input source to another. 

You can connect your Laptop by connecting the HDMI cable to it for a while and check the picture quality and whether it is showing the same horizontal lines on your LG Smart TV Screen.

#3. Performing Power Cycle

The Power cycle is an effective way of solving common tv problems. It is also a basic step to troubleshoot while you are trying to fix the horizontal lines either black or colored lines on LG TV’s display.

To perform the power cycle, you need to unplug the power cord from the power source and keep it disconnect for 15 mins and then restart again.

#4. Update LG TV Firmware

If you are facing the issue of the horizontal lines on your LG TV screen and you want to fix this issue, then you need to update the firmware via their OTA updates to the latest version. 

This is a good solution for the issue and it will work most of the time in these issues.

The first thing you want to do is to check if your LG TV has the latest software updates. If the TV is still new, you might want to check for updates more often. 

If you haven’t yet, you can easily do this by using your remote control going to the Home screen and then to the Settings menu screen.

You will find the option to check for updates in the Support area. If there are updates available, download them.

After updates are installed properly check whether it is showing updated to the latest version. Now, it is recommended to perform restart your LG LCD TV or LED tv.

You can find the instructions on how to do this in the user manual that comes with your TV.

#5. Factory Reset your LG Smart TV

If the TV screen problem persists even after updating to the latest firmware, it may be a hardware issue with the TV itself.

This will remove any settings that might have been updated on your TV, so you’ll have to do it before you make any changes to your TV. 

This can be done quickly in the settings and it will usually run a season scan to make sure that your TV is back in working order. 

How much does it cost to repair horizontal lines on LG Smart TV?

LG Smart TV panels are not cheap and replacing them would need a good amount of cost.

However, it will depend on the panel type and panel size. Though the horizontal line on your LG Smart Tv may look minor, it can’t be repaired.

Either you need to compromise on your viewing experience by viewing the horizontal line on your screen or you need to replace your Display panel to eliminate any horizontal line.

If the panel is an LCD panel, it will be cheaper and it would cost more to replace if it is an LED panel. Also, costlier if you have an OLED panel or OLED panel.


Let’s conclude the post on the troubleshooting guide for LG TV Horizontal Lines on Screen!

This is a very common problem and I hope that I was able to help you to fix horizontal lines.

This is also seen in other TVs like Philips Tv, Vizio Tv, Samsung LED TV, Sony Bravia TV, Panasonic TV and almost every brand of TV.

I hope you enjoyed reading the post. 

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