Shift - Troubleshooting: No Sound / Not Working – Avantree Support

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No Sound? Check These Two Things First

First confirm that the headphones are connected to the transmitter. Then check whether the transmitter is receiving sound from your TV.

Most no-sound issues are caused by the TV audio signal.

If the headphones and transmitter are already connected, focus on the OPT or AUX indicator on the transmitter. It should be solid, not blinking.

Follow These Checks in Order

Stop when the sound returns.

Check the Headphone & Transmitter Connection

Both channel indicators should be solid and the same color.

Look at the channel indicator on the headphones and the corresponding channel indicator on the transmitter.

Transmitter

Channel indicator is solid

Headphones

Same solid channel color

If the colors do not match:

Use the channel select button on the transmitter and the channel switch on the headphones until both show the same channel color.

If the headphones are not connected at all:

Pair the headphones with the Shift transmitter before continuing.

Pair / Add Headphones

Check the Audio Signal

Look at the OPT or AUX indicator on the transmitter.

The transmitter needs to receive sound from your TV. Check the OPT or AUX indicator, depending on how your Shift is connected.

Solid Indicator

The transmitter is receiving sound from your TV.

Blinking Indicator

The transmitter is not receiving the TV audio correctly. Continue with the checks below.

Fix the TV Audio Signal

Follow the instructions for the connection you are using.

AUX Connection

If You Are Using an AUX Cable

Disconnect the AUX cable from the transmitter.
Connect your headphones directly to the TV's audio output using the AUX cable.
Play something on the TV and listen for sound.

No sound when connected directly?

The TV is not sending audio from that port. Check the TV's audio output settings or try another audio output.

Optical Connection

If You Are Using an Optical Cable

Check whether anything is connected to the TV's HDMI ARC port. If so, disconnect it temporarily.
Unplug the optical cable from the Shift transmitter, then plug it back in securely.
Set the TV's digital audio output format to PCM. Find PCM Settings for Your TV

Using Netflix, Amazon Prime, or another streaming service?

Start playing the program first. Then open the TV's sound settings and change the digital audio output format to PCM.

Fix Netflix / Prime Video No Sound

Check the Indicator Again

The OPT or AUX indicator should now stay solid.

After adjusting the connection or TV settings, play audio on the TV and look at the transmitter again.

OPT / AUX is now solid

The transmitter is receiving sound from your TV. Test the headphones again.

OPT / AUX is still blinking

The transmitter is still not receiving the TV audio correctly. Recheck the TV's audio output setting and cable connection.

Still No Sound?

Tell our support team whether your headphone and transmitter channel indicators match, which cable you are using, and whether the OPT or AUX indicator is solid or blinking.

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