No sound from the radio

I'm not getting sounds from the radio in my 525i 2001… the stations are displayed and the CD play works but when I try to listen to the radio there isn't any sound. Any ideas out there on what might be wrong?

Did the antenna somehow get disconnected?

I'd look at the fuse for the power amp (the amp is in the trunk, left side.) Not sure if the amp is fused at the amp, or in the regular fusebox.

There's a lot of this going around.

http://www.bimmerfest.com/forums/showthread.php?t=396131