What is most likely causing the VIZIO backlight malfunction when the backlight does finally come on after multiple attempts. Once on, it stays steady and bright until turned off. It might normally come back on the next time it is powered up.
That is not a disassembly! All is shows is taking the back of the camera off. How about showing how to disassembly the camera down to its individual components and make repairs, like getting the lens to extend of fixing a sticking shutter.