Follow these steps if you can't hear any sound from your headphones after playing audio from a connected source device. However, if these steps require model-specific information, check your manual. Manuals are posted on your model support page. 1. Make sure your audio source is on and the volume is up. 2. If your headphones have a volume button or knob, make sure to turn it up. 3. If you have battery-powered headphones, make sure there is enough charge. 4. Check the connection of your headphones. Wired connection: 1. Make sure the headphone jack is firmly plugged into the correct audio jack. If the audio source uses a line remote, disconnect the remote and plug directly to the audio source. 2. If you can hear the sound from your headphones, the line remote may require repair. Bluetooth connection: 1. Make sure to select your headphones in the Bluetooth settings of your audio source. 2. Turn your headphones off and on. Pair your headphones to your audio device again. 5. Try connecting your headphones to another audio source. 1. If the sound is heard, the first audio source may require repair. 2. If your headphones don't produce any sound after connecting to a second audio source, your headphones may require repair.  Go to Product Repair.