HT280 - 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 HT280 transmitter and headphones, then play a TV program or video with sound.

Step 1 – Check the Headphone Connection

Keep the headphones turned on and near the transmitter. Check the headphone LED.

Solid Lime Green – Connected to the transmitter. Continue to Step 2 →

Solid Red – Not connected. Follow the pairing guide below.

Pair Headphones with Transmitter →

Step 2 – Check the Audio Signal & Settings

Play TV audio and check the transmitter's signal light.

Solid Signal Light – TV audio detected.

Flashing Signal Light – No TV audio detected. Check the settings below.

Why PCM? HT280 needs a compatible stereo audio signal. If your TV sends Dolby or another surround-sound format, you may hear no sound. Set the TV audio format to PCM / Stereo.

Choose your TV connection type and follow the matching instructions.

Optical Cable

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

Red / White RCA

Use the TV's Audio OUT ports, not Audio IN.
Check that the RCA cables are securely connected.

Coaxial Cable

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

Find PCM Settings for Your TV →

Step 3 – Check Connections, Volume & Restart

Make sure the audio cable is securely connected to the TV and transmitter.
Increase the headphone volume and make sure the TV is not muted.
Try another TV channel or video.
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? 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?

Tell us your TV model, cable type, and transmitter/headphone LED status.

Contact Avantree Support →