OK, so we know the display assembly its self is good and we know the systems logic board video services is good. So that limits the problem down to the connector on the logic board.
Can you take some good detailed images of the connector solder joints and the connectors pins. I suspect we'll see something. Post them in your question so we can see them.
Are you sure you got the correct display assembly for this system?
There is no fuses for the data interface only for the backlight power lines.