Harmony 2 - Fix No Sound – Avantree Support

Before You Start: No sound may mean the speaker is not connected to the transmitter, the transmitter is not receiving audio, or the volume is too low.

Step 1 – Check the Speaker Connection

Solid White – The speaker is connected.

Blinking White – Pairing in Broadcasting mode.

Turn on the transmitter and speakers.
Keep the speakers near the transmitter while they connect.
If a speaker keeps flashing white, turn it off and back on. Keep it near the transmitter and wait a few seconds for it to reconnect. The speaker LED should turn solid white.

Step 2 – Check the Audio Signal & Transmitter Input

Play audio and check the transmitter’s OPT/AUX input indicator.

Solid White – Audio input detected. Continue to Step 3 →

Flashing White – No valid audio signal. Check the settings for your selected input below.

Choose the input that matches your audio source. Set the side switch to match the type of audio source connected to the transmitter.

Optical

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

AUX

Set TV Sound Output to Headphones / Audio Out.
Increase the TV volume.

Bluetooth

Press and hold Phone / Pair for about 4 seconds. The indicator flashes red and blue when pairing mode is ready.
Open your phone’s Bluetooth settings, select Avantree Base Flex, and play audio.

Find PCM Settings for Your TV →

Why PCM? For Optical connections, the transmitter needs a compatible stereo signal. Set the TV audio format to PCM / Stereo. Dolby, DTS, Bitstream, Auto, or Pass Through may cause no sound.

Step 3 – Check Volume & Restart

Increase the volume on the audio source, transmitter, and speaker.
Make sure the audio source is not muted. Try another channel, video, or app.
For Optical or AUX, check that the audio cable is securely connected at both ends.
If there is still no sound, try a new cable of the same type.
Turn off the transmitter and speaker, then turn them back on and test again.

Still No Sound?

Tell us whether you’re using Optical, AUX, or Phone Bluetooth, and describe the transmitter and speaker indicator lights.

Contact Avantree Support →