No sound or poor sound quality

• Check if the sound settings of the TV are OK, press the  volume or  mute key.
• If you use a digital receiver (set-top box), check if the volume on this receiver is not set to zero or mute.
• Check if the TV - the audio signal - is properly connected with the Home Theatre System, if you use such a system for the TV sound. Check if you connected the HDMI cable to an HDMI1 ARC connection on the Home Theatre System.
• Make sure that the TV audio output is connected to the audio input on the Home Theatre System. 
  Sound should be heard from the HTS (Home Theatre System) speakers.

Sound with loud noise

If you watch a video from a plugged in USB flash drive or connected computer, the sound from your Home Theatre System might be distorted. This noise is heard when the audio or video file has DTS sound but the Home Theatre System has no DTS sound processing. You can fix this by setting the Digital out format of the TV to Stereo.
Press  (Home) > Settings > All settings > Sound > Advanced > Digital out format