Hi, I have a 2008 Samsung PN50A550 plasma tv. TV wouldn't turn on, so I replaced the fuse next to the power supply. TV worked great for a year until the fuse blew again. I replaced the fuse, and it lasted three months, replaced again, fuse lasted 3 weeks. Any idea what is going on? I'm close to buying a new tv but really like the picture on this one. Thanks.