Opera - Fix No Sound – Avantree Support

Before You Start: No sound may be caused by disconnected headphones, incorrect TV audio settings, a loose cable, or muted headphones. Turn on the Opera transmitter and headphones, then play a TV channel or video with sound.

Step 1 – Check the Headphone Connection

Keep the headphones close to the transmitter and check their connection light.

Solid Blue – Headphones connected. Continue to Step 2.

Headphones Not Connected? Turn off Bluetooth on nearby previously paired devices, then follow the pairing and locking guide below.

Opera – Pair, Connect & Lock Headphones →

Step 2 – Check the TV Audio Signal & Settings

Play TV audio and check the transmitter's white audio signal indicator.

Solid White – TV audio detected.

Flashing White – No Signal. Check the TV audio settings below.

Choose your TV connection type and follow the matching instructions.

Optical Cable

TV Sound Output: Optical / Digital Audio Out.
Digital Audio Format: PCM / Stereo.
Set the transmitter input switch to OPT.

AUX / 3.5 mm

TV Sound Output: Headphones Out, if available.
Increase the TV volume.
Set the transmitter input switch to AUX.

Red / White RCA

Use the TV's red and white Audio OUT ports, not Audio IN.
Use an RCA-to-3.5 mm audio cable.
Set the transmitter input switch to AUX.

Find PCM Settings for Your TV →

Step 3 – Check Connections, Volume & Restart

Check the cable connection:
Make sure the cable is securely connected to the TV and the correct input port on the transmitter.

Optical Cable
Connect to the transmitter's OPT input from TV.

AUX Cable
Connect to the transmitter's AUX input from TV.
Set the transmitter's input selector to match your connection: OPT or AUX.
Increase the headphone volume using the + button.
Make sure the headphone Mute function is OFF and the TV is not muted.
Try another TV channel or video.
Try NEW audio cable of the same type.
Still no sound? Turn off the transmitter and headphones, reconnect the audio cable, then turn them back on and test again.

No Sound on Certain Apps or Cable Boxes? Play the affected program and set the TV or streaming device's audio format to PCM / Stereo.

Cable Box Audio Settings →

Still No Sound?

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

Contact Avantree Support →