How to Fix LG TV Flickering Screen (STEPS)


Why does my LG TV screen keep flickering?

The main reason why a LG TV keeps flickering is because of a software glitch, electrical interference or incorrect picture menu settings.

 

Possible Causes

  • Weak internet connection
  • Damaged HDMI cables
  • Incorrect angle of the TV

 

Damaged HDMI cables and ports

HDMI cables can last for many years – up to 10. But if they are exposed to external factors like constant shearing, they get worn out quickly. When the outer layer of the cables gets torn, their internal wiring is exposed. It then leads to permanent damage.

 

Outdated TV software

Smart TVs – just like laptops or smartphones – need to be updated on time. If you haven’t installed updates on your TV, it’s time for you to do so. Outdated software leads to constant glitches, disrupting the smooth running of your TV.

 

Dust inside the ports

Just like HDMI cables, a TV’s ports are also exposed to external factors like dust. Debris buildup inside the ports hampers their performance. Ensure that your TV’s ports are cleaned. 

 

Weak internet connection

If you are streaming and suddenly observe that the TV’s screen is flickering, you should check your internet connection first. Weak internet connections send corrupted frames to the TV, resulting in screen flickering. You can consider resetting your WiFi router to fix the issue.

Also, if the walls of your TV lounge are too thick and the WiFi router is kept in another, you should consider bringing the router closer to the TV. Thick walls are a big hurdle in signal transmission.

 

Electrical interference

Multiple electronic gadgets near the TV cause electromagnetic interference. When gadgets that use 2.4GHz frequency are set together, they cause electromagnetic interference, disrupting the TV’s output quality.

 

LG TV flickering screen

 

How do I fix an LG TV screen that keeps flickering?

To fix a LG TV screen that keeps flickering, reboot the TV, replace cables or change your angle.

 

Reboot The TV [Method 1]

  1. Turn off the TV.
  2. Unplug it from the main power source.
  3. Wait for 2 minutes (60 seconds).
  4. Plug the TV back.
  5. Turn it on.

 

Replace Cables [Method 2]

Damaged HDMI cables cause TV screen flickering. Get a new set of cables and attach them to the TV for a better experience. Also, troubleshoot the cables by:

  1. Taking out all the cables.
  2. Plugging them into the TV one by one to see which one is causing the problem.

 

Change Your Angle [Method 3]

Your viewing angle plays an important role in your overall experience. Adjust your position and see if the problem goes away. If it doesn’t, adjust the TV’s position. If the issue still doesn’t get resolved, the problem is an internal one – a non-functioning backlight or a software glitch.

 

Picture Test [Method 4]

  1. Press the Settings button on the remote.
  2. On the pop-up menu, scroll down to the All Settings option.
  3. Press Picture.
  4. In the Picture menu, tap the Picture Test option.
  5. Follow the on-screen options.

 

If the TV passes the test, it indicates that the screen has no issues and that the external devices attached to the TV need repair.

Turn Off Energy Save Mode [Method 5]

  1. Press Settings on your remote.
  2. Go to All Settings.
  3. Select Picture.
  4. Choose Energy Saving.
  5. Turn off the option.

The flickering should stop by now. 

 

Adjust The Backlight Settings [Method 6]

  1. Press the Setting button on the remote.
  2. Press All Settings.
  3. Go to Picture.
  4. Select Picture Mode Settings from the menu.
  5. Scroll to the Customize option.
  6. Go to Backlight.
  7. If it’s set to 100, change it.
  8. Bring it down to a level where the flickering stops.

 

Clean The Ports [Method 6]

  1. Take a small cotton bud.
  2. Damp it in the alcohol solution.
  3. Use it to clean the ports.

 

Tip

  • DON’T try this step when the TV is switched
  • Ensure that the TV is switched off
  • Let the TV sit idle for around 15 minutes for its power to drain out completely
  • Begin the process when you’re certain there is no active electric current

 

What does it mean when my LG TV is flickering?

When your LG TV is flickering, it usually means it is receiving corrupted frames from the primary video source

For users, it leads to bad experiences. This problem usually resolves on its own – especially when the video source starts sending uncorrupted frames. But you can still try a tested method to resolve the issue. 

 

  1. Turn off the TV.
  2. Wait for at least 20 seconds.
  3. Turn on the TV. 

Why is my LG TV flickering on and off?

The reason your LG TV is flickering on and off is because of damaged cables

 

To fix this:

  1. Replace the set of cables and buy good-quality wires. Ensure that you have bought thick wires as they don’t get damaged quickly.
  2. Loose connections also make your TV screen to flicker. Unplug all cables. Plug them back into the TV one by one. Insert one cable and then tighten it – manually check if the cable is firmly held. Repeat the process.
  3. A damaged LCD screen may cause such flickering as well. In most cases, you will have to get the screen replaced. However, the cost of replacing the screen is too high. If convenient, you may consider buying a new TV set.

 

Why does my LG TV screen keep flickering lines?

The reason your LG TV screen is flickering with lines is because of electromagnetic interferenceDevices that use the same or higher frequency as your TV interrupt the electric signals received by your TV.As a result, your TV display gets disrupted.

 

To fix the issue:

  1. Switch off the nearby electronic devices.
  2. Turn on each of them one by one.
  3. See which device causes more disruption.
  4. Turn that device off. 

 

How to fix flickering horizontal lines on an LG TV?

To fix flickering horizontal lines on an LG TV, you should run a picture test on the TVHorizontal lines on an LG TV could also be caused by damaged wires and tables or a broken LCD.

 You can start the picture test by following these steps:

  1. Press the Settings button on the remote.
  2. On the pop-up menu, scroll down to the All Settings option.
  3. Press Picture.
  4. In the Picture menu, tap the Picture Test option.
  5. Follow the on-screen options.

 

The picture test can tell if the display is corrupted or not.

 

How to fix flickering vertical lines on an LG TV?

To fix flickering vertical lines on an LG TV, you can power-cycle the TV.

For this, you will have to follow these steps:

  1. Turn off the TV.
  2. Take out the power cord.
  3. Wait for at least 2 minutes.
  4. Insert the power plug back. 
  5. Turn on the TV.

 

You can also check the cables or run the picture test to see if these two factors are causing vertical lines on the TV.

Why is my LG TV screen black and flickering?

The reason your LG TV screen is black and flickering could be because the connection between the HDMI cable and TV has loosened.

You can try the following methods to fix it:

  1. Unplug the power cord.
  2. Wait for at least 15 seconds.
  3. Turn on the TV.
  4. If this step doesn’t work, check the fuse.
  5. If the fuse doesn’t work, check for any voltage problem.

 

Any issues with the backlight settings may also cause the same problem. You may try the following steps: 

  1. Press the Setting button on the remote.
  2. Press All Settings.
  3. Go to Picture.
  4. Select Picture Mode Settings from the menu.
  5. Scroll to the Customize option.
  6. Go to Backlight.
  7. If it’s set to 100, change it.
  8. Bring it down to a level where the flickering stops.

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