Paff, got that "black screen" too. But the main error was selfmade.
i had plugged in two display-cables into my graphiccard. One cable goes to my normal Monitor and the other cable goes to the "off switched" TV in my living room. The damned Windows 7 setup routine changed - while installing - to the other port on my graphiccard which was connected to my TV (20 meters away from me). After 4 hours i managed it to find the problem. I unplugged the TV connection and the setup routine keeps on the first graphiccard port. that was all!