After updating the firmware of the Sound Bar or AV receiver, the Sound Bar or speaker connected to the AV receiver stopped producing audio from the TV.

IMPORTANT: This article applies only to specific products and/or operating systems. Check the Applicable Products and Categories of this article before starting these steps.

Turn the eARC function of the Sound Bar or AV receiver off, and check whether this resolves the symptom.

The latest firmware update for the Sound Bar and AV receiver includes the addition of the eARC function.
However, if your TV is not compatible with the eARC function and only the HDMI cable is used to connect the TV to the Sound Bar or AV receiver via the HDMI terminal (ARC), this symptom may occur.

Check your TV's manual or support page to confirm whether your TV is compatible with the eARC function.

Refer to the following for how to turn off the eARC function of the Sound Bar or AV receiver.

For Sound Bar:

1. Using the Sound Bar remote control, press the HOME button.
2. Select Setup on the home menu on the TV screen.
3. For HT-ST5000:
   Select System Settings.
   For HT-X9000F/Z9F:
   Select Advanced Settings.
4. Select HDMI Settings.
5. Select eARC, then set to Off.

For AV receiver:

For STR-DN1080:

1. Using the AV receiver remote control, press the HOME button.
2. Select Setup on the home menu on the TV screen.
3. Select HDMI Settings.
4. Select eARC, then set to Off.

For STR-DH790:

1. Using the AV receiver remote control, press the AMP MENU button.
2. Select <HDMI> on the display panel on the front of the receiver.
3. Select EARC, then set to OFF.

NOTE: About the eARC function
eARC (Enhanced Audio Return Channel) is a new feature of HDMI Specification 2.1.
In addition to audio formats supported by the conventional ARC (Audio Return Channel), it is also compatible with the latest audio formats.
Connecting the Sound Bar or AV receiver to an eARC-compatible TV enables you to use object audios or multichannel LPCM which could not be transmitted by your TV or HDMI-connected device using ARC. This includes Dolby Atmos, Dolby TrueHD, and DTS:X.
The eARC function is added when you update the firmware of the Sound Bar or AV receiver to the latest version.
For details on how to confirm the firmware version and update the firmware for the Sound Bar or AV receiver, refer to the manual of the relevant device.