Where can i get a stereo fixed?

[BOSS]

I bought this jensen about two years ago,waited to put it in for a year,then about 2 months later i cant get any sound to the speakers.I know it is hooked up right and can see the little lights and things working,it does pick up stations and all just no sound!!I got it at wally world so i cant take it back.I shouldnt have bought it so early.it is the mp3 player model,around $300 so i would like to not have to buy a new one.anyone know someone that works on them?Thanx..........Arthur