I recently bought a 2003 Honda Accord and it's been great so far but for some reason the radio will only play a high pitched noise no radio, cd, aux. It's only when the stereo is on but I don't know what it is or how to fix it. This is my first car. Please Help.

 

Did it work OK for some time after you bought it? Was any work done just before it started this problem? I'm thinking of something like unplugging the antenna, but that doesn't explain why it doesn't work with CD or Aux...?