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Opera - Fix No Sound

  • Updated

Before You Start: Turn on the Opera transmitter and headphones. Play a TV channel or video with sound.

Step 1 – Check the Headphone Connection

  1. Make sure the transmitter and headphones are turned on.
  2. Keep the headphones close to the transmitter.
  3. Check the headphone connection light.
Solid Blue – Connected. Continue to Step 2.
Flashing Red & Blue – Pairing mode.

Not connected? Turn off Bluetooth on nearby devices previously paired with the headphones. Then follow the Pair & Lock guide.

Opera – Pair & Lock Guide →

Step 2 – Check the TV Audio Cable

  1. Make sure the audio cable is firmly connected at both ends.
  2. Connect the TV's audio OUT to the transmitter's INPUT FROM TV, not its bypass output.
  3. Set the transmitter input switch to OPT for Optical or AUX for AUX/RCA.

Note: The MIC position is for the transmitter's microphone mode, not a direct TV audio cable connection.

Step 3 – Check TV Audio Settings

Open the connection you are using:

Optical Cable
  1. Connect TV Optical OUT to transmitter OPT IN.
  2. Set TV Sound Output to Optical / Digital Audio Out.
  3. Set Digital Audio Format to PCM / Stereo.
  4. Set the transmitter input switch to OPT.
Find PCM Settings for Your TV →
AUX / 3.5 mm
  1. Connect TV Headphone / Audio OUT to transmitter AUX IN.
  2. Set TV Sound Output to Headphones Out, if available.
  3. Increase the TV volume.
  4. Set the transmitter input switch to AUX.
Red / White RCA
  1. Connect the TV's red and white Audio OUT ports to the transmitter's AUX IN using an RCA-to-3.5 mm cable.
  2. Make sure the TV ports are labeled OUT, not IN.
  3. Set the transmitter input switch to AUX.
Step 4 – Check the TV Audio Signal

While the TV is playing, check the transmitter's white audio signal indicator.

Solid White (Steady) – TV audio detected.
Flashing White – No valid audio signal detected. Check the cable, TV sound output, and PCM setting if using Optical.
Step 5 – Check the Volume and Mute
  1. Increase the headphone volume using Volume +.
  2. Set the headphone Mute switch to Unmute.
  3. If the headphone mute indicator is orange, the sound is muted. Switch it to Unmute.
  4. Try another TV channel or video.
No Sound on Certain Apps or Cable Box?

If regular TV sound works, set the TV or streaming device's digital audio format to PCM / Stereo.

Cable Box Audio Settings →
Still No Sound? Restart
  1. Turn off the transmitter and headphones.
  2. Reconnect the TV audio cable firmly.
  3. Turn on the transmitter, then the headphones.
  4. Wait for the solid blue connection light, then test again.

Still No Sound?

Tell us your TV model, cable type, headphone LED status, and whether the transmitter's white audio signal indicator is solid or flashing.

Contact Avantree Support →

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