Find helpful information about your LG Product through our Help Library. Find helpful information about your LG Product through our Help Library.

Help library

Find helpful information about your LG product

[LG OLED TV Sync] The video and audio are not synced

Troubleshooting

If the video and audio are not syncing on particular channels

➔ If the video and audio do not sync only on a particular channel, it is highly likely that there is a problem with the broadcast signal of that channel.
Please contact your broadcast service provider first for assistance.

If the video and audio are not syncing on all channels

➔ Try using both the TV speaker and an additional external speaker. If the sound is out of sync, adjust the sync in [Match Screen and Sound].
Try delaying the TV's audio output to sync it with the external speaker.

Try this

➔ Setting in [2021 WebOS6.0] or later

Press the setting button on the TV remote and select [All Settings] → [Sound] → [Advanced Settings] → [Match Screen and Sound].

※ This only applies to the TV speaker or devices that support the [Sound Share] feature and are connected to the HDMI (eARC/ARC) port of the TV.


1. Turn on the TV and press the [Settings] button on your TV remote.
Select [All Settings] in the [Settings] menu.

Image that enters all settings by pressing the setting button on the remote control

2. Select [Sound] → [Advanced Settings]→ [Match Screen and Sound].

Image of selecting additional settings in the sound menu
Image to select match screen and sound

3. Select [Bypass] in [Match Screen and Sound].
The sound from the broadcast signal or external device will be output without delay.

Image of selecting bypass setting

4. If the problem persists, turn off Bypass and select [TV Speaker Delay] to adjust the value carefully.
The closer the value is to 60, the slower the voice output gets.

Image of adjusting speaker delay

➔ Setting in [2020 WebOS5.0] or before

Press the setting button on the TV remote and select [All Settings] → [Sound] → [Additional Settings] → [AV Sync Adjustment].

1. Turn on the TV and press the [Settings] button on your TV remote. Select [All Settings] in the [Settings] menu.

Image that enters all settings by pressing the setting button on the remote control

2. Select [Sound] →[Additional Settings]→[AV Sync Adjustment].

Image of selecting more settings in the sound menu
Image to select AV Sync Adjustment

3. Select [Bypass] and set it to [ON], and then check if the audio and video are synced.

Image of selecting bypass

4. If they are still out of sync after [Bypass] is enabled, select [Bypass] and set it to [OFF], and then adjust the video and speech volume by selecting from 0 to 15

Images that directly adjust the screen and sound sync

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

*Required question