Vizio M470SL Issues

[Audioplus]

This one is driving me nuts! Unit powers up with remote and manually. I get the backlight, no picture or menu. I've replaced the Power Supply and been through 2 Main Boards (I'm suspecting that the main board may be faulty). I am now going to try a LED Driver, but really don't know how that could be the issue.

Should I try another PS, or try a Main Board? None of the regular suppliers have Main Board's available so I do believe it could be faulty, maybe try a 3rd?

Does anyone know how to access firmware for Vizio? I would like to try a new firmware download?

[budm]

Re: Vizio M470SL Issues

How about the T-CON board? Or it is one of those panel with integrated T-CON?
'I get the backlight' That means the backlights circuits and lights are OK.