I'm having the same problem. I'll look at the fuses in the diagram but I'm leaning towards new main board?
All rca inputs work fine just none of the hdmi inputs.
Please help. I'm good at working with electronics. Even on the circuit level.
I've had some training.
I'm willing to try. Just need some guidance.
I have wd73838…
I also have a fully working wd73638 I can use for parts if it will work.