Before You Start: No sound may be caused by disconnected headphones, incorrect TV audio settings, or a loose cable. Turn on the HT41899 Plus transmitter and headphones, then play a TV channel or video with sound.
Step 1 – Check the Headphone Connection
Turn on the black headphone first, then the red headphone. Check their connection lights.
Solid Blue – Headphones connected. Continue to Step 2.
Headphones Not Connected? Follow the pairing and locking guide below.
HT41899 Plus – Pair & Lock Headphones →Step 2 – Check the TV Audio Signal & Settings
Play TV audio and check the transmitter's AUX / OPT audio signal indicator.
Solid AUX/OPT – TV audio detected.
Flashing AUX/OPT – No Signal. Check the TV audio settings below.
Choose your TV connection type and follow the matching instructions.
Step 3 – Check Connections, Volume & Restart
- Ensure the cable is securely connected to both the TV and transmitter.
- Increase the volume on both headphones and make sure the TV is not muted.
- Try a NEW audio cable of the same type.
- Still no sound? Restart the TV, transmitter, and both headphones. Wait for the solid blue connection lights, 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 →
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