Sound Issues
If you experience any of the problems below while using the product, please check the following. There may not be a problem with the product.
First of all, perform a HOME Setting icon All Settings icon Sound Sound Test to check for any abnormalities in the TV.
If you are using a set-top box, turn it off, and then turn it back on.
Make sure that the set-top box is correctly connected to your TV.

The screen is fine, but it does not play any sound.
  Try another channel.
  HOME Setting icon All Settings icon Sound Sound Out
  Check whether the Sound Out is set to Internal TV Speaker + Optical or Internal TV Speaker.
  If you use a set-top box, there will be no sound if you have set the volume of the set-top box or your TV to 0 or enabled Mute. Set the volume to an appropriate level.

There is no sound coming from one of the speakers.
  HOME Setting icon All Settings icon Sound Sound Mode Settings Balance
  Adjust the balance as necessary with the Navigation button in Balance.
  When you are connecting to the AV IN / COMPONENT IN, check if the audio left / right (white / red) cables are correctly connected. (AV IN / COMPONENT IN ports are available in certain models only.)

The TV sound is not synchronized with the picture, or the sound sometimes breaks up.
  If this happens on only some of the channels, it may be caused by the broadcasting company’s transmission signal. Please have your broadcasting services provider (wired / cable) diagnose the problem.
  If all channels are out of sync, go to HOME Setting icon All Settings icon Sound AV Sync Adjustment and adjust the sync.
  If you are using a set-top box, consult its supplier.

The volume changes when I change the channel.
  The volume of different broadcasting stations’ transmission output may vary.
  HOME Setting icon All Settings icon Sound Volume Mode Auto Volume
  Set Auto Volume to On.
  If you are using a set-top box, consult its supplier.

The sound does not work or only the background music is played in some programs.
(Programs produced for export by broadcasting companies)
  Wheel (OK) Audio language
  Set your language preference in Audio Language.