Same happened to me yesterday...windows 7 reinstall and everything went black...tryed with older drivers too, still not working?!
I have downloaded the latest drivers from the dell site, and i am trying to install them.
But, as soon as the installation is done, i will get a black screen.
When i move my mouse, i can only see my mouse the time i am moving it.
If i reboot my computer, i will first see the dell logo(load screen of windows 8), and after that, my screen goes black again.
I can access the windows 8 start-up menu(press F8 at start up), and restore a backup i have made.
When i do the backup, everything works again.http://www.trainingbangalore.in/android-training-in-bangalore.html
Well it somehow fixed itself. Restarted it after leaving it for an hour worked. (Didn't work before)