Press and hold the POWER button until a menu appears → select Restart.Press and hold the POWER button until Power off appears on the screen.Restart the TV with the supplied remote control:.Restart the TV by selecting the option depending on your TV.Note: Skip this step if your power cord is not accessible. Troubleshoot no sound through the Optical outputĬheck if you can hear sound after you complete each step. In this case, you should connect the optical jack from the source device (Blu-ray Disc™ player, DVD player, etc.) directly to the home theater or stereo system to get sound. The sound sent to the TV through an HDMI® connection, or other input, may not output through the optical jack. In this case, you would need to use a secondary analog connection to pass the audio signal. If the video doesn't contain a digital audio signal, you won't hear sound through this connection. This feature is available on certain digital broadcasts and streaming videos and isn't supported on standard cable or analog stations. The optical jack is designed to output sound when the video you're watching contains digital audio (PCM or Dolby Digital® technology). The connected third-party sound bar, or home theater system may not be compatible with your TV.Your TV isn't updated with the latest software version.

The optical cable isn't securely connected.The Digital audio out volume is set too low in the TV settings.Your TV isn't set to a digital channel, or playing a video that is encoded in 5.1 audio.The connected home theater system, audio receiver, or soundbar isn't set to properly decode the digital signal.The following situations may cause this issue:

Av to digital optical converter