HT4189 - Fix No Sound – Avantree Support

Before You Start: No sound may be caused by disconnected headphones, incorrect TV audio settings, or a loose cable. Turn on the HT4189 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 the headphone connection light.

Solid Blue – Headphones connected. Continue to Step 2.

Flashing Red & Blue – Pairing mode.

Headphones Not Connected? Turn off Bluetooth on nearby devices previously paired with the headphones. Then follow the pairing and locking guide.

HT4189 – Pair & Lock Headphones →

Step 2 – Check the TV Audio Signal & Settings

Play TV audio and check the transmitter's OPT / AUX audio signal indicator.

Solid OPT/AUX – TV audio detected.

Flashing OPT/AUX – 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.

AUX / 3.5 mm

TV Sound Output: Headphones Out, if available.
Increase the TV volume.

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.

Find PCM Settings for Your TV →

Step 3 – Check Connections, Volume & Restart

Ensure the cable is securely connected to both the TV and transmitter.
Increase the headphone volume and make sure the TV is not muted.
Try another TV channel or video.
Try a NEW audio cable of the same type.
Still no sound? Restart the TV, transmitter, and headphones. Wait for the solid blue connection light, then 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, and transmitter/headphone LED status.

Contact Avantree Support →