I made a live CD and booted it up and chose to "try Ubuntu".
Some stuff happened and now my screen is just blank and my monitor says
Whats happening? Is it installing or what? Its been like this for about 10-15 minutes.
Video mode setting may be failing during the boot process for some reason. You may need to try setting the 'nomodeset' option at boot.
Look here for a guide to change kernel boot options on the Live media: https://help.ubuntu.com/community/BootOptions#Changing_the_CD_Boot_Option_Configuration_Line