I drive a 1998 2.8 A4. I went school and I was listening to the radio(engine off keys not in the ignition) had to go to class so I turned off the stereo by pushing the power/volume control in. I came back at during a break to move my car, I tried to turn on the radio but nothing happen. I checked all the fuses on the driverside to see if any blown, none did.
The stockstereo has no display or sound, sort like its not getting anypower. Anyone have any ideas? Could a dealership tell whats up?

 

i think there might be a fuse behind the headunit. you'll probably need to take the thing out to check what's really going on