white noise, from speaker, very load, from a nissan micra 2007 ?

the stereo stoped playing a cd, radio worked for couple of minute's then a very load white noise coming from speaker, took radio fuse out, but it carried on, pulled all other fuses out one by one, still never stopped, in the end had 2 disconnect battery 2 stop it, have left the fuse out, so no music, can u help?