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[LG TV] Troubleshooting Picture and Sound Using TV’s Self Diagnosis Feature

Troubleshooting TVs 10/02/2024

There are various causes of TV picture and sound issues.
Besides a malfunction of the TV itself, these problems can also be caused by the quality of the broadcast signal being received.

If you experience problems with the picture and sound while watching a broadcast, you can troubleshoot using a feature available on your TV.
This feature tests whether your TV can display picture and sound normally, but it does not test the broadcast signal.
If the test results show no problem, the issue may lie with the broadcast signal rather than your TV. In this case, you may need to contact the broadcaster to discuss the problem.

The steps below is based on webOS.
If you don't find the test feature in Settings, it may not be available on your TV model. Please refer to your user manual for more detailed information.

Try this

Picture Test / Screen Self-Diagnosis

webOS TVs purchased in 2021, or later Settings[ Setting button ] button on the remote control → [All Settings] → [Support] → [Screen Self-Diagnosis]
webOS TV purchased in 2020, Settings [ Setting button ] button on the remote control → [All Settings] → [Support] → [Additional Settings] → [Picture Test].
webOS purchased before 2020 TV, Settings [ Setting button ] button on the remote control → [All Settings] → [Picture] → [Picture Test].
OLED TVs with webOS purchased between 2021 and 2023 Settings [ Setting button ] button on the remote control → [All Settings] → [General] → [OLED Care] → [Device Self-Care] → [Screen Self-Diagnosis]
After the picture test is finished, an image appears on the screen, and you are prompted to confirm whether the image on screen is displayed clearly.
UHD and FHD images appear on the left and right sides of the screen for comparison of image quality.

Sound Self-Diagnosis

webOS TVs purchased in 2021, or later Settings[ Setting button ] button on the remote control → [All Settings] → [Support] → [Sound Self-Diagnosis]
webOS TV purchased in 2020, Settings [ Setting button ] button on the remote control → [All Settings] → [Support] → [Additional Settings] → [Sound Test].
webOS purchased before 2020 TV, Settings [ Setting button ] button on the remote control → [All Settings] → [Sound] → [Sound Test].
OLED TVs with webOS purchased between 2021 and 2023 Settings [ Setting button ] button on the remote control → [All Settings] → [General] → [OLED Care] → [Device Self-Care] → [Sound Self-Diagnosis]
After the sound test is finished, test sound is played and a message appears on screen prompting you to confirm whether the sound is heard clearly.
A message appearing on the screen asking if you want to change the sound out settings to continue testing your TV sound.

This guide was created for all models, so the images or content may be different from your product.

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