If your LG TV screen brightness turns up and down by itself, it means that the TV might have flickering problems. Such issues can be quite irritating when you are interestingly watching content. On an LG TV, the flickering problem might be due to buggy software or damaged hardware. Nonetheless, you can follow these troubleshooting methods to stop LG TV from flickering.
Reasons for LG TV Flickering
There might be a few technical issues on your LG TV and those problems might cause the flickering issue. Here are the most common reasons behind it.
- LG TV may be in power saver mode
- Software glitches
- Maybe an issue with a video source
- Loose cabling or damaged cables or ports
- Outdated firmware
- Defective hardware
How to Fix LG TV Flickering Issue
Here are some workarounds that would help to fix the flickering issue on LG TV.
Fix the Lighting of Your Room
Some LG TV models use plasma screens that are prone to flickering issues under fluorescent lighting conditions in your room. Turn off the lights in your room and see if the flickering issue is fixed. If your LG TV still flickers, you can try the next troubleshooting method.
Unplug your LG TV
Turn off and unplug your LG TV from the plug point and leave it for a minute. Meanwhile, long press the physical power button on the TV (not the remote) for 30 seconds to drain the residual power. Now plug in the TV cord to a wall socket after a minute and see if the issue is fixed.
Turn Off Energy Saving Mode
This is a feature in LG TV that adjusts the brightness of the screen based on the ambient lighting of your room. The Energy Saving Mode in LG TV helps reduce power consumption by altering the screen brightness. In some situations, this might be the reason for your flickering issue, so you can turn it off.
 Press the Smart Button on the LG TV remote.
 Click on the Settings icon.
 Select All Settings and enter Picture Settings.
 Choose the Energy Saving option and turn it Off.
Now, observe if the issue is fixed. Otherwise, try the next troubleshooting.
Check the Cables and Ports
A loosely connected or damaged cable or a damaged port can cause the flickering issue. Check all the cables attached to your LG TV, and look for damages. Remove all the cables and examine if any of the ports are damaged. When you find any damaged cables, replace the cables.
If you find that port has been damaged, connect a device to a different port. If all the cables and ports are fine but you’re still facing the flickering issue, proceed to the next troubleshooting.
Run a Picture Test
Running the built-in picture test will help you quickly identify and diagnose the problem. Follow the steps below to run a Picture Test on your LG TV.
- 2022 TV Models: Settings > All Settings > General > Settings > OLED Care > Device Self Care > Screen Self-diagnosis.
- webOS 6.0: Settings > All Settings > Support > Screen Self-diagnosis.
- Older Models: Settings > All Settings > Picture > Picture Test > Enter.
Examine all the test pictures and external video peripheral screens, and observe if the screen flickers. Picture Test will help you determine if the problem is with your LG TV or external video devices.
Check the Video Sources
If LG TV flickers while using a streaming device or gaming console, plug it into a different HDMI port. This way, you can able to determine if the flickering problem is due to your TV or an external device.
If the issue is with a particular app, try AirPlay or Cast the app to check if you’re facing the same problem. If that works fine, the problem might be with the app, try updating the app to solve the issue.
Note: Sometimes, the issue may be with your input. Therefore, you can change the input on LG TV to check for issues.
Run a Pixel Refresh
If you’re facing flickering problems on an LG OLED TV, you can use a Pixel Refresher to fix the issue. This feature is added to improve the overall reliability of the TV by reducing screen shifts and recovering retention.
 Go to the Settings of your LG TV.
 Select the Picture option.
 Select OLED Panel Settings
 Click on the Pixel Refresher.
 To start immediately, click Start Now.
During the process, you might see a white line moving on your screen. It is not a malfunction. Do not turn off your TV during the process and do not remove the TV cord from the power source.
For newer LG TV models, the procedure might differ, go to Settings > All Settings > General > OLED Care > OLED Panel Care > Pixel Cleaning.
Pixel Refresher or Pixel Cleaning might take 10 minutes to 1 hour based on the model year of your TV.
Pixel Refresher may or may not fix the flickering issue. If the issue is still there after the process, do not do Pixel Refreshing a second time, this might do more harm than good. Instead, try the next troubleshooting method.
Update your LG TV
Outdated firmware can also be a reason for the flickering issue. Update your LG Smart TV (webOS) to the latest firmware and check if the issue is fixed.
 Go to Settings > All Settings > Support.
 Select the Software Update option.
 Click on Check for Updates.
 If any updates appear, click Download and Install.
 Once the TV is updated, it will automatically restart LG TV.
Check if the flickering issue is gone. If it still exists, try the next troubleshooting method.
Factory Reset LG TV
Factory resetting your LG TV will restore all the settings of your LG TV to the default. This might even fix if LG TV has no signal from the external device.
 Go to Settings > All Settings > Support or General.
 Select Reset to Initial Settings.
 Select OK to reset LG Smart TV.
Once the reset process is complete, check if the issue is resolved.
Contact LG Customer Support
If none of the methods fix the flickering issue, visit the LG support webpage to seek further assistance. Otherwise, you can contact customer service or visit the nearest LG service center. It will help you fix, repair or replace your TV.
Frequently Asked Questions
You can fix LG TV that keeps turning off by unplugging your TV from the power output for 60 seconds and turning it on, updating your firmware, or resetting your TV.
Check if the cable is connected to your LG TV properly, and also check if the cables are damaged. If you find any, replace them.