My TV doesn't output sound through the DIGITAL AUDIO (OPTICAL) OUT port.

Below are some possible causes for this issue:

• The connected home theater system, audio receiver, or sound bar is not set to properly decode the digital signal.
• The TV is not tuned to a digital channel.
• The setting for the Optical digital audio output is disabled. （Only for BRAVIA 9 (XR90), BRAVIA 8 (XR80), BRAVIA 7 (XR70), and A95L Series.）
• The optical cable is faulty or not securely connected.
• The TV may require a system software (firmware) update. Downloads are posted on your model support page.
• The connected third-party sound bar or home theater system may not be compatible with the TV.

Follow the troubleshooting steps below if the optical port does not appear to be working.

Note: Each of these steps represents a possible solution to no sound being heard from a TV when using an optical connection to a home audio system or sound bar.

1. Make sure the home theater or stereo system is set to the appropriate input and mode for the optical connection.
2. Make sure the optical cable is firmly connected to both the TV and the home theater or stereo system.
3. Try changing the channel on the TV to another digital broadcast.
4. Only for BRAVIA 9 (XR90), BRAVIA 8 (XR80), BRAVIA 7 (XR70), and A95L Series: If the setting for the Optical digital audio output is disabled, enable it.
   1. On your TV remote control, press the Quick Settings ( or ) button.
   2. Select Settings → Display & Sound → Audio output → Optical digital audio output settings.
   3. Enable Optical digital audio output.
5. Go into the Sound or Speakers menu of the TV and select External Speakers or Audio System.

   IMPORTANT: Some TVs require that the internal speakers be turned off before outputting the audio signal to another device. This step turns off the internal speakers.

6. For Android TV™ or Google TV™ models, if the audio system is not compatible with Dolby Digital or DTS, perform the following steps:

   1. Open the Settings screen. How to access the Settings
      • If the remote control has a Quick Settings ( or ) button, press the Quick Settings button and select Settings.
      • If the remote control does not have a Quick Settings ( or ) button, press the HOME button and select Settings.
   2. The next steps will depend on your TV menu options:
      • Select Display & sound → Audio output → Audio system settings → Digital audio output → PCM.
      • Select Display & Sound → Audio output → Digital audio out → PCM.
      • Select Bravia Settings → Digital audio out → PCM.
      • Select Sound → Digital audio out → PCM.

7. Make sure the TV has the latest system software update.

8. Replace the optical cable.

9. If the issue is still not resolved, disconnect the optical cable and use an analog connection to output the sound from the TV to the audio system.

   Note: If using a source device (such as a cable set-top box, satellite receiver, or DVR) to get the signal to the TV, you may also be able to connect this device to the audio receiver using an optical connection.
   The following image provides an example of this type of connection:

    
   1. TV: Video IN
   2. Audio device: Optical IN
   3. Source device: Optical OUT
   4. Source device: Video OUT
10. Factory reset the TV. For how to perform a factory reset, refer to the following articles:
    • For Google TVs and Android TVs
    • For other TVs