Radio problems
 

Hey guys, new here first time posting.
Well I have had this problem for awhile now, since my shoved coins into the cd slot. The coins are all taken out from a mechanic.
The radio works, with the screen and volume working fine. It's just I can't here anything out of the speakers. I don't know what's wrong, hopefully you guys could help me out.

Edit: it's a Mazda 3 2006 with factory mazada radio.