hello all, new user here. I have a sony head unit with a CDX U 300 in the back. I think it got some rain water on it the other day but am not too sure. Now the disc changer is not working and the head unit comes up with a "E-99" when i try to put the cd's on. Also, although there is power going to the changer it wont eject the cd's...someone please help me....