Radio no sound

[Edryn724]

Can someone please help... I drive 2003 x5 3.0 and having random no sound problem with my radio. I recently had my alternator replaced and ever since then ive been getting no sound on my suv randomly will have sound then no sound. I took it back to the shop and they said that there were no other wires he thinks that would cause that when he replaced the alternator.He said that its possible that there might be a short when my alternator went bad and try to jump start it when it had a bad alternator.What can cause this? My fuses seems to be ok. Any response to shed a light is appreciated.Thanks!