Fix No Sound After Setup

No sound usually means the headphones are not connected, the wrong output is selected, or the TV audio format is not supported.

Quick Check

1️⃣ Check Transmitter Signal & TV Audio

● Solid light → TV audio detected

● Flashing light → No audio from TV

Quick fix: Re-check the TV audio output and cable connections, then set TV Audio Settings → Digital Audio Output → PCM. Learn Here:

 2️⃣ Check Headphone Connection

● Solid blue → Connected to transmitter

● Flashing blue → Not connected

Quick fix: Pair the headphones with the transmitter. Learn Here

3️⃣ Match the Input Mode

Set the transmitter input to match your TV: AUX | Optical | HDMI ARC.

4️⃣ No sound from a specific app

If sound works elsewhere but not in apps like Netflix or Prime Video: Set the TV app setting or Streaming Device setting to PCM/Stereo

Most Common Reason

The TV is set to an unsupported audio format (Dolby/DTS instead of PCM) or the headphones are not properly connected.

💡 Tip:

After a TV system update, the audio output settings may change automatically. If the sound suddenly stops working, please check that the TV’s audio output is set to PCM. Also try unplugging and reconnecting the audio cables, then restart both the transmitter and the headphones.

Still not working?

Contact us at ✉️ support@avantree.com and include:

● LED behavior (color and flashing pattern)

● Your TV model

● How everything is connected (Optical, AUX, HDMI ARC)