The answer is much easier now... Take it back there and insist they fix it. If it worked prior to your visit then they are obviously responsible. If you have the resources, and do not trust the 16 year olds who work at circut city, take it to a electrical shop, have them fix the problem, and then have someone eles, prefeably a lawyer give them the reciept with promises to sue if they don't pay up!! Sounds like a lot to do but if they are responsible, that is why they carry insurance!!