DOLBY DIGITAL OUTPUT ISSUES
Check the audio settings
Access the Home screen by pressing the Home button on the LG remote.
Access the Audio menu and check the Digital Output Settings:
Note: Some Blu-ray discs may have multiple audio tracks available on the disc. If adjusting the sound settings does not resolve the issue, it may be necessary to access the pop-up menu of the Blu-ray in question to see if a Dolby Digital track must be selected within the disc settings.
Find help information for your LG product