Re: 42PFL3704D/F7 No picture

I've had a similar problem with backlight (Seems like no picture but you can see it when you shine a flashlight on the screen) and thanks to the helpful advice on here, I found the issue. That little black fuse next to the 8a white one on the inverter board you were talking about sjanpb labelled 15 was the culprit.
Got one from mouser (I think $0.77 each or so P/N 576-0466, 750NR) installed it and it worked. I used a fast blow 63V 750mA SMD.
Hope this helps others.