Apparently the Dell 2400 graphics card is supported by Linux drivers, but we would need to know more about what the "command line" stuff you are talking about that appears. Not Always, but usually when you have a blank screen there's a problem with the xserver (graphics card problem). If there is an xorg problem, then you should be dropped to a shell login, but you say there is nothing? Apparently the splash screen/xorg server is borked.
Here's a link to someone with a similar problem. here
I know this won't help you but I have installed 10-12 different distros on about 40 different PCs. Sorry to say that I have had more installation problems with Ubuntu and it's variations than any other distro.
Edited by Trio3b, 10 March 2008 - 12:21 AM.