My radio doesnt work and im going nuts!

ok, i'll admit i dont know shit about cars but what i do know is that my radio does not work. all of the displays funtion such as the volume meter, the time, and the station and so forth but i get no sound! could anyone please tell me whats wrong? and if your wondering yes it was disconnected from the battery for god knows how long because it was in the shop.

Check TWO fuses. "RADIO" and "ROOM". Both need to be good for the radio to work.