If the sound cuts out or you hear no sound while watching your LG TV, use the Sound Self-Diagnosis or Sound Test feature to check the TV’s internal speakers.
If the test sound plays normally, the TV speakers are working properly.
Check any connected set-top box, soundbar, or HDMI cable.
The broadcast signal may also be causing the issue. If you hear no sound or distorted audio during the test, your TV may require service.
How to Run Sound Self-Diagnosis or Sound Test
Case 1. Run the Sound Test on an OLED TV
Check Your TV’s webOS Version
Press the Settings button (gear icon) or the Mute button on your TV remote three times in a row. Your TV will display the webOS version.
- If the test sound plays normally, the TV’s internal speakers are working properly. Check the connected set-top box, soundbar, or HDMI cable. The broadcast signal may also be causing the issue.
- 2024 or later OLED TVs (webOS 24 or later): Press Settings on your remote, then go to All Settings, Support, and select Sound Self-Diagnosis. Then follow the on-screen instructions to check the sound.
- 2021 to 2023 OLED TVs (webOS 6.0 through 23): Press Settings on your remote, then go to All Settings, Support, OLED Care, Device Self Care, and select Sound Self-Diagnosis. Then follow the on-screen instructions to check the sound.
- 2020 OLED TVs (webOS 5.0): Press Settings on your remote, then go to All Settings, Support, Additional Settings, and select Sound Test. Then follow the on-screen instructions to check the sound.
- 2019 or earlier OLED TVs (webOS 4.5 or earlier): Press Settings on your remote, then go to All Settings, Sound, and select Sound Test. Then follow the on-screen instructions to check the sound.
Case 2. Run the Sound Test on Non-OLED TVs
- 2021 or later TVs (webOS 6.0 or later): Press Settings on your remote, then go to All Settings, Support, and select Sound Self-Diagnosis. Then follow the on-screen instructions to check the sound.
- 2020 TVs (webOS 5.0): Press Settings on your remote, then go to All Settings, Support, Additional Settings, and select Sound Test. Then follow the on-screen instructions to check the sound.
- 2019 or earlier TVs (webOS 4.5 or earlier): Press Settings on your remote, then go to All Settings, Sound, and select Sound Test. Then follow the on-screen instructions to check the sound.
Case 3. Still Need Help?
If the issue continues, request a repair service.
Frequently Asked Questions
- Q. Why Are Voices Quiet but Background Music Too Loud?
- A. Open the sound mode settings and select Standard. For clearer voices, select Clear Voice Pro. Compare the sound and choose the setting that works best for you.
- Q. Why Does the Test Sound Play Through the TV Speakers When I Use External Speakers?
- A. This is normal. During the test, the TV automatically switches the audio output to its internal speakers so it can check whether they are working properly.
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This guide is based on standard models. The settings menu may vary by model.
