My Samsung HDTV Need Help

I have a Samsung HP-T4254 (42" Plazma) It was great until it started clicking while on one day and then shutting down... Now it just clicks when pluged in and does not come on any longer. does any one have an idea of what the problem is and if not can you send me to a company who can fix the problem or sell me the part needed (fingers crossed that it is something simple like changing out a plug and play card)