Mensagem original de: rdklinc ,
I would take out the board again and re-assemble, making sure all the connections are secure and that you didn't miss any. But first I'd disconnect the video cable and re-attach it, making sure the latch is in place, because sometimes even a slightly loose video cable will cause no video or no backlight. When it powers up do you see a faint image (shine a flashlight through the Apple symbol from behind)? If you do, then you likely either have a bad screen panel (bad bulb) or a blown backlight fuse on the board. But the fact that the power LED is not working points to bigger issues, which is why removing the board again makes sense. While you have it apart, I would disconnect the DC-in from the board and let the two sit for an hour to discharge...sometimes allowing a "bad charge" to dissipate can cause normal behavior to be restored.