Before You Start: No sound may be caused by disconnected headphones, incorrect TV audio settings, or a loose cable. Turn on the HT5009 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.
Headphones Not Connected? Turn off Bluetooth on nearby previously paired devices, then follow the pairing and locking guide below.
HT5009 – Pair & Lock Headphones →Step 2 – Check the TV Audio Signal & Settings
Play TV audio and check the transmitter's AUX / OPT audio signal indicator.
Choose your TV connection type and follow the matching instructions.
Step 3 – Check Connections, Volume & Restart
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Check the cable connection:
Make sure the cable is securely connected to the TV and the correct input port on the transmitter.
Optical CableConnect to the transmitter's OPT input from TV.
AUX CableConnect to the transmitter's AUX input from TV.
- Increase the headphone volume using the + button.
- Make sure 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 on the transmitter followed by the headphones. Wait for the solid blue connection light 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, and transmitter/headphone LED status.
Contact Avantree Support →
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