HT41899 Plus 2- Fix No Sound – Avantree Support

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 transmitter and both 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 – Headphones not connected.

Still flashing? If one or both headphones are not connected, follow the guide below to reconnect them.

Fix Headphone Connection Issues →

Step 2 – Check the TV Audio Connection

Connect the TV's audio OUT to the transmitter's OPT IN or AUX IN.
Use only one audio cable – Optical or AUX, not both.
While the TV is playing, check the transmitter's audio signal light:

Solid White – TV audio detected. Continue to Step 3.

Flashing White – No valid TV 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.

Find PCM Settings for Your TV →

AUX / 3.5 mm

Connect TV Headphone / Audio OUT to transmitter AUX IN.
Set TV Sound Output to Headphones Out.
Increase the TV volume.

Step 4 – Check the Volume

Increase the volume on each headphone.
Make sure the TV program is not muted.
Test the black and red headphones separately.

Step 5 – Try a New Audio Cable

If using Optical or AUX, try a new cable of the same type.
Reconnect both ends firmly, then play audio and test again.

Still No Sound? If you're using Optical, make sure the TV's digital audio format is set to PCM / Stereo.

Find PCM Settings for Your TV →

Note: If the replacement cable works, the original cable may be faulty.

No Sound on Certain Apps or Cable Box?

If regular TV sound works, play the affected program and 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 both headphones.
Reconnect the TV audio cable firmly.
Turn on the transmitter, then both headphones.
Wait for the solid blue headphone connection lights, then test again.

Still No Sound?

Tell us your TV model, cable type, transmitter/headphone LED status, and whether the issue affects the black or red headphones.

Contact Avantree Support →