I just bought a dock that plays CD's, tapes and iPhone music (3 generations of music, still listen to them all) and charges the iPhone. But when I plug it in, I get the above message and horrible high pitched noises every once in a while. I told HMV but they wont take it back after 30 days. So I'm stuck with it. Is there any way to stop this high pitched noise? Every when I'm not using it it still makes the noise. Thanks for the help.