1.83GHZ MBP 15" 2gb ram. Last month my HD died, replaced it on my own, a glitch or two, running fine now. 2 weeks ago the screen went dark, I hooked up a external screen, been working with that for the last week. Just today I received in the mail my new inverter piece from ifixit. put it in, not hard at all, but the screen is still dark. It still works on external screen fine, still can see the shadows on the notebook screen, what went wrong? any ideas? is there a fuse?