4 Ways To Fix LG TV Horizontal Lines On Screen

LG TV is one of the top TV brands out there. The brand has evolved over the years to include many features to enhance performance, most especially the LG smart TVs.

Despite being a high-quality product, you may notice some glitches as you use your LG TV. One of such glitches is horizontal lines showing on your screen when you turn on your TV. If you’ve noticed the same on your TV, there is no need to panic just yet.

Lines on your TV screen don’t necessarily mean your TV screen is damaged. It can be caused by other factors.

This post covers possible reasons why your LG TV is showing horizontal lines when you turn on your TV. Also, you will learn possible tips to fix the issue at home. You don’t need to be a geek to carry out any of the steps in this post.

Why Is My LG TV Showing Horizontal Lines On Screen?

Several issues can cause your LG TV to show horizontal lines on the screen. One of the common issues is that there is a problem with the TV’s display. Below is a breakdown of possible reasons for your LG TV lines.

a. Image Resolution Issue

Your TV will display horizontal lines if there is an incompatible image resolution. In other words, the TV resolution is different from the display image size.

It could be that the image is too large or too small for the TV resolution. Or the quality of the image is too poor and can’t load properly on your TV. It will cause your TV to display horizontal lines. One quick way to fix this is to change the image resolution display on your TV.

d. Out-of-date Firmware

If your TV’s firmware is out-of-date, it means the TV is running on outdated graphic drivers. Outdated graphic drivers can’t process higher resolution display pictures and will cause your TV to display horizontal lines.

The TV firmware is software. New and updated versions are released periodically with new features. You have to update your TV’s firmware to the latest version.

b. Damage on Display Panel

Most times, the horizontal line on your TV screen is a telltale sign that the TV’s display panel or screen is damaged. That doesn’t mean that it’s the only cause of horizontal lines on your screen. Other factors can cause this.

c. Issue With HDMI Cable

If the HDMI Cable on the Smart TV and the Smart Hub is faulty or not connected properly, the quality of the display will be reduced and won’t load on the display screen. The effect is horizontal lines on your TV screen. To fix this, unplug and plug in the cable again. If the cable is loose, change the cable.

4 Tips To Fix LG TV Horizontal Lines On Screen

a. Check The Lines

First, check the lines on your TV screen to know if the lines are stable or shaking. If the lines on the screen are stable, it means the display panel or screen is damaged. The option is to take the TV to a technician to replace the TV display panel.

On the other hand, if the lines on the screen are shaking, it shows the issue is from the HDMI cable. Check to see if the cable is loose and replace the cable. Also, make sure the cable is connected properly.

b. Update Your TV Firmware

If you’ve fixed the HDMI cable and the horizontal line is still showing, it’s time to update the TV’s firmware. We mentioned earlier that firmware is software that requires periodic updates.

The step is to check for new software updates and update to the latest version. Doing this will likely fix the horizontal line. Follow the steps below to update the firmware on your LG TV.

. Press the ‘Home’ button on your remote control.

. Go to ‘Settings’ and ‘Support’ from the options.

. Select ‘Software Update’. If there is new software available, you will find the ‘Update Now’ option.

. Select ‘Update Now’ to commence the download process.

. To complete the process, follow the instructions on your screen.

c. Carry Out A Picture Test

Picture test is a self-diagnosis feature on most LG smart TVs. The test is used to check if a display image is compatible with your Smart TV or not. Also, it is used to troubleshoot and fix display-related problems on your TV.

Follow the steps below to complete a picture test:

. Press the ‘Home’ button on your TV remote control.

. Select ‘Settings’ from the option.

. Choose ‘Advanced / All Settings’.

. Select ‘Picture

. Wait for your TV to perform a ‘Quick Scan’. The process may take a couple of minutes to complete the scan.

Option 2. Change Aspect Ratio of TV

. Press the ‘Home’ button on your TV remote control.

. Select ‘Settings’ from the option.

. Choose ‘Advanced / All Settings’.

. Select ‘Picture’ and ‘Aspect Ratio’.

. Go through the options until you have the right setting for your TV. For most people, the 16:9 ratio works them.

d. Perform a Factory Reset

Horizontal lines on your LG TV could mean that there’s an error on the graphic driver or TV source. The best way to fix this is to perform a factory reset on your TV.

A factory reset should be the last option for you. Resetting your LG smart TV will clear any saved data. You have to configure the data from scratch after the factory reset. Follow the steps below to perform a quick factory reset.

. Press ‘Settings’ and ‘All Settings/Advanced Settings’ from the options.

. Select ‘General’.

. Select ‘Reset To Initial Settings’.

. Press ‘OK’.

. Follow the instructions on the screen to complete the process.


One of the common reasons your LG TV is showing horizontal lines on display is that the screen is broken. Other likely factors can cause it to happen. For instance, an issue with the HDMI cable. This post has outlined all the possible issues and provided tips to fix the issue.