Vizio VP42HDTV sound no picture

Question

Tv has very low hour use in my bedroom (120 hrs.). Went to turn on and I had sound and no picture or menu display. Tried doing what Vizio says to do on there site unlug for 3 minutes to reset with no results. looked for blown fuse and they are still white. from what I have read on the forums it could be a bad power supply. Is there someting else I need to look at or should I just try changing out the power supply. Production date is October 2006 and like I say very low hours. Thanks for any help