Please follow the instructions below to troubleshoot the issue...
Step 1: Make sure that the unit is not muted. Try and increase the volume
Step 2: Press the power button on the unit or remote control to switch the sound bar to standby mode. Then press the button again to switch the soundbar ON
Step 3: Unplug the soundbar from the AC socket, then plug it again. Switch on the Sounbar
Step 4: Ensure the audio setting of the input source (Ex: TV, Game Console, DVD Player etc.) is set to PCM mode
If the issue persists then please contact our Customer Support Team at 888-842-3577 for further assistance