hello guys,I have a Panasonic Viera TX-L42U2E about 2 and a half years old,recently some dimmed spots appeared on both sides and a dimmed circle int he middle,they are mostly visible on white,bright background,what do you think may be the problem?the warranty has expired already.What is damaged and can I fix it by myself and how expensive a repair would be?this is how it looks like
http/i59.tinypic.com/egv4oo.jpg
http/i59.tinypic.com/egv4oo.jpg