If you can boot to Safe Mode, you can change your display resolution to 640 x 480 which should allow you to boot up normally. You probably need a video driver which you should be able to download from Dell's web site by putting in your service tag.
I have a dell inspirion which is updated to 2gb. I downloaded Windows 8 and upon the first reboot the screen turned black and I can only access F2 and F12.

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