I have the above model Vizio and until now it has been trouble free. It simply stopped having a picture. I checked the fuses and they are good, and after reading a number of threads on these TV's, I took the plunge and bought a new main board and replaced it only to find the problem remains. The TV powers up, logo goes from amber to white, will power on from either the remote or the power button and the sound is fine. The control board has a single green LED that glows steady. No other LED's light during the power up cycle. I haven't check power to the Y or Z boards yet, but based on the logo...