Rep Power: 0

Yesterday, I started my car and no sound came from the speakers, no matter the output. I tried rebooting the head unit, no luck. Sometimes the volume will work and sometimes it doesn't, but either way, still no sound. When I start the car, I hear a sound like when you're plugging in an aux. I still hear beeps when I press buttons, but that's it. I also tried exiting from voice commads and making a call, like some youtube videos suggested, nothing. I took it to a Honda dealer and they said they have no idea what's wrong. They also tried to suggest that all of my speakers blew at once which is ridiculous. Any suggestions?