I know this looks like my own personal issue, but i have just fixed mine !!!!!!!! :-D
So the secret is... DON'T PANIC !!!
It will be either of the two larger flat cables, the one for top screen and/or the lower screen.
If you imagine a piano keyboard, the contacts on these cables are like that... i think my cables weren't pushed in far enough for the "black keys"...???
So release the catches.... remove and relocate the cables making sure they are in up to the little "stoppers" on the sides of the cable and close the catch again...
I held my bettary in place and switched on to test so i didn't have to keep taking the case apart.
GOOD LUCK ! :-D
(smiling) Mark Lewis, November 2008