[LG TV Noise] I am experiencing a piercing noise.

Is the noise too loud to watch TV?

Anomalies with broadcasting signals or the TV may lead to noise.
You can check if there is a problem with the product using the sound test.

Try this

Is the noise coming from the channel you are watching?

? Go to [Settings] and start [Sound Test] to check if the sound works normally.

Conducting [Sound Test] in Settings

[2020] WebOS 5.0

Press the button on the TV remote and select [All Settings] → [Support] → [Additional Settings] → [Sound Test].
Turn on the TV and press the [Settings] button on your TV remote.
Select [All Settings] in the [Settings] menu.

1. Select [Support] and then 2. [Additional Settings].

3. Select [Sound Test] in [Additional Settings].

4. Check the sound coming from the TV and respond when prompted.

[Prior to 2019] WebOS 4.5

Press the button on the TV remote and select [All Settings] → [Sound] → [Sound Test].
Turn on the TV and press the [Settings] button on your TV remote.
Select [All Settings] in the [Settings] menu.

Select 2. [Sound Test] in 1. [Sound].

3. Check the sound coming from the TV and respond when prompted.

[Prior to 2013] Netcast

Select [Smart] or [Settings Menu] → [Settings] → [Customer Support] → [Sound Test].

General TV

Select [Settings Menu] → [Customer Support] (press the red button at the bottom of the TV remote) → [Sound Test].

When the test voice is heard normally, it is likely that the broadcasting signal has a problem.
Please contact the set-top service provider. (e.g., cable TV, Skylife, IPTV)
If the test sound has the same problem, please contact LG Electronics service technician for further troubleshooting support.

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