Before You Start: No sound may occur if the headphones are disconnected, the TV audio settings are incorrect, or the transmitter is not receiving audio. Turn on the HT5009 transmitter and headphones, then play a TV channel or video with sound.
Step 1 – Check the Headphone Connection
Keep the transmitter and headphones turned on and close together. Check the headphone LED:
Solid Blue – Connected. Continue to Step 2.
Flashing Red & Blue – Pairing mode.
Not connected? Turn off Bluetooth on nearby devices previously paired with the headphones. Then follow the Pair & Lock guide.
HT5009 – Pair & Lock Guide →Step 2 – Check the TV Audio Connection
- Connect the TV's audio OUT to the transmitter's OPT IN or AUX IN.
- While the TV is playing, check the transmitter's audio signal light:
Solid White – TV audio detected. Continue to Step 3.
Flashing White – No audio detected. Check the TV audio settings in Step 3.
Step 3 – Check TV Audio Settings
Open the connection you are using:
Optical Cable
- Connect TV Optical OUT to transmitter OPT IN.
- Set TV Sound Output to Optical / Digital Audio Out.
- Set Digital Audio Format to PCM / Stereo.
AUX / 3.5 mm
- Connect TV Headphone / Audio OUT to transmitter AUX IN.
- Set TV Sound Output to Headphones Out, if available.
- Increase the TV volume.
Red / White RCA
- Connect the TV's red and white Audio OUT ports to the transmitter's AUX IN using an RCA-to-3.5 mm cable.
- Make sure the TV ports are labeled OUT, not IN.
Step 4 – Check the Volume
- Press Volume + on the headphones.
- Make sure the TV program is not muted.
- Try another TV channel or video.
No Sound on Certain Apps or Cable Box?
If regular TV sound works, set the TV or streaming device's digital audio format to PCM / Stereo.
Cable Box Audio Settings →Still No Sound? Restart
- Turn off the transmitter and headphones.
- Reconnect the TV audio cable firmly.
- Turn on the transmitter, then the headphones.
- Wait for the solid blue headphone connection light, then test again.
Still No Sound?
Tell us your TV model, cable type, and transmitter/headphone LED status.
Contact Avantree Support →
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