I replaced my lcd ribbon cable successfully using this video:

http://www.youtube.com/watch?v=pDQ81cahD1c

Maybe it can help?

Sorry I can't give ya more to go on.

Actually now that I reread what you wrote I wonder if you've damaged your ribbon cable? When I did that to mine I could still power it up and the keyboard lit up when it was slid open but the screen never lit up and pressing it seemed to do nothing (my cable was totally cut). Also I could charge my unit and turn it on but the led indicator on the screen never lit up.