If lip-sync is off on only one channel, the broadcast signal for that channel is usually the cause. If it happens on all channels, adjust Match Screen and Sound or AV Sync Adjustment until the audio matches the picture.
If the issue happens only on a specific channel, it is usually caused by that channel’s broadcast signal.
If the issue happens on all channels, the TV’s audio processing or an external audio device connection can introduce a delay that needs to be adjusted in the TV settings.
A problem with the broadcast signal for that channel is the most likely cause.
Contact your broadcast service provider for assistance.
The delay may be related to the TV speaker processing or an external speaker connection.
Use the TV’s sound sync settings to match the picture and sound.
First, confirm whether the issue occurs on one channel or all channels.
If it occurs on all channels, try the TV speaker and an external speaker, then adjust Match Screen and Sound or AV Sync Adjustment until the audio matches the video.
If the issue is only on a particular channel, the broadcast signal for that channel may be causing the issue.
Contact your broadcast service provider first for assistance.
If it happens on all channels, continue with the settings below.
Setting: All Settings > Sound > Advanced Settings > Match Screen and Sound
1) Press the Settings button on the TV remote, then select All Settings.
2) Select Sound, then Advanced Settings.
3) In Match Screen and Sound, select Bypass.
This outputs sound from the broadcast signal or external device without delay.
Setting: All Settings > Sound > Advanced Settings > Match Screen and Sound > TV Speaker Delay
If the problem persists, turn off Bypass and select TV Speaker Delay.
Adjust the value carefully.
The closer the value is to 60, the slower the voice output gets.
Setting: All Settings > Sound > AV SYNC Adjustment
1) Press the Settings button on the TV remote, then select All Settings.
2) Select Sound, then AV SYNC Adjustment.
3) Select Bypass and set it to ON, then check whether audio and video are synced.
4) If they are still out of sync, set Bypass to OFF and adjust the sync value (0 to 15) for internal TV Speaker + Optical.
This usually indicates a broadcast signal issue specific to that channel. Contact your broadcast service provider for support.
Bypass outputs sound without delay. If sync is still off, turn Bypass off and adjust the TV’s delay or sync value to match the picture.
If the steps above did not resolve your issue, please visit the LG Electronics Support website. You can chat with our virtual assistant or schedule a service repair for further assistance.
※ Please note that service fees may apply for engineer visits if your product is out of warranty.
Your email has been successfully registered.
The restocking notification has already been updated.
Add items to your MY LG wishlist
OTP authentication failed. Please verify your mobile number to use for mobile OTP login.
Split your purchase into equal monthly payments*
* Subject to credit approval
Choose PayPal at checkout and select PayPal Credit.
Representative Example: Assumed Credit Limit £1200 - Purchase Rate 23.9% p.a. (variable) - Representative 23.9% APR (variable).
PayPal Credit is a regulated credit agreement.
LG Electronics U.K. Ltd acts as a credit broker, not a lender.
Borrowing more than you can afford or missing payments may negatively impact your financial position and your ability to obtain credit.
If you fail to make repayments or in certain other circumstances, PayPal may remove your offer, and any outstanding amount will be charged at your standard variable rate.
View full Terms & Conditions and FAQs for PayPal Credit here
