after about 6 months with no radio in my car i finally had enough money leftover to buy a cd player, on my way home after having it installed the sound just cut, the player still plays fine but i cant hear nothin, the place that installed it told me that the ground from my door speakers was touchin metal, but it wasnt, and they told me they have nothin to do with what happened, anyone got any suggestions i could try to get my shit to work? any help would be REALLY appreciated.