Sony TV problem, please help?

The power board is a common issue on tvs. You can call or email the manufacturer to see what they say. It is probably not cost effective in repairing your tv due to the high cost of labor on repairs. Sony will probably just tell you or provide you with a list of authorized technician close by, so they can take a look (for a fee also just to determine what is wrong. You are better off buying a new tv.