Unhappy [Q] Black screen after replacing

Hi Guys,
After I "replaced" the screen,it was blank, yet booting and visible to computer,
I decided to recheck - and switched to the old screen. It didn't work either!
So now I have two sceens but non is functional

Any ideas?
Btw, i found this topic
http://forum.xda-developers.com/show....php?t=2529791
but there is no solution