Is there any audio fuse inside? Lights/connection work but no sound

There is no sound coming out of my Zeppelin air. It was stored for about one year in a dry, cool place, away from vibrations or dust and reinstalled when my Mac computer has been reformatted. Connection works well and LED lights flashes exactly as manual says during iPOD, wireless and AUX but no sound is coming out. It was perfect when stored about a year ago. Is there any internal audio fuse or switch that can be defective? Please help me. Thanks.