No sound from radio
Hello all, I'm a new ower of a 2005 BMW Z4 2.5i and I'm having a problem with the radio. The radio turns on and all of the functions work but I can't get any sound out of it. I checked fuse #'s 47, 48, 49, and 50 and all were fine. Then I remembered that it has a amp so I went to check the fuse for that but can't find where it would be. I looked on the amp and next to it but could not find a fuse for it.
So my questions are,
1) Is there a fuse for the amp?
1A) If so where do I find it?
2) Am I on the right track to finding out what is wrong?
2A) If not where should I be looking?
On a side not I did a search for this here and all over the web with very little info found.
Thank you for any info,