Ensure that the audio Source from the TV on-screen Menu is selected correctly:
- Press the [Menu] button on the remote control
- Press the cursor [Up][Down] to select [Setup] and press the cursor [Right]
- Press the cursor [Up][Down] to select [Source] and press the cursor [Right]
- Press the cursor [Up][Down] to select [Analog Audio In] and press the cursor [Right]
- Press the cursor [Up][Down] to select [AV1] and press the [OK] button
- Press the [Menu] button to exit the Menu