HT5009 Plus - 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 HT5009 Plus transmitter and headphones, then play a TV program or video with sound.

Step 1 – Check the Headphone Connection

Keep the headphones near the transmitter and check their indicator lights.

Headphones – Solid Blue: Connected.

Transmitter – Solid White: Headphone 1 connected.

Headphones Not Connected? Follow the guide below to pair and lock the headphones to the transmitter.

HT5009 Plus – Pair & Lock Guide →

Step 2 – Check the Audio Signal & Settings

While the TV is playing, check the OPT / AUX indicator on the transmitter.

Solid White – Valid TV audio signal detected. Test the headphones.

Flashing White – No valid TV audio signal. Check the settings below.

Choose your connection type and follow the matching instructions.

Optical Cable

TV Sound Output: Optical / Digital Audio Out.
Audio Format: PCM / Stereo.

Find PCM Settings →

AUX / 3.5 mm

TV Sound Output: Headphones Out.
Increase the TV volume.

Step 3 – Check Connections, Volume & Restart

Check the cable connection:

Optical Cable

Ensure the optical cable is securely connected to the transmitter's OPTICAL INPUT FROM TV port.

AUX Cable

Ensure the AUX cable is securely connected to the transmitter's AUX INPUT FROM TV port.
Increase the volume on the headphones.
Try a new audio cable of the same type.
Still no sound? Restart the transmitter, headphones, and TV, then test again.

No sound on certain apps or cable boxes? 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 →