Fedora :: Can't Use The Init 3

Lately I've been trying to install the Nvidia Cuda driver for Linux.In order to do this, I have to tun a .run file. When I run it in the console, It says that I can't install when running the X server. So I try to use "init 3".When I type it, and hit enter, the screen goes black, no blinky cursor thing, just a frozen black screen. I followed one of the nvidia tutorials on here to get the normal nvidia driver, and it worked successfully.Before I installed the nvidia driver, when I would use "init 3" I would get a colourful console window with random coloured blocks of random lettering. It seems that installing the nvidia form the tutorial turned this into a black screen.