I was just doing regular stuff when the computer froze and shutdown.  I turned it back on and everything looked different.  The computer is a Dell and at the Dell screen there were blue streaks.  The windows icon looked jumbled.  Then it went to the menu asking whether I wanted to start in safe mode or normally, but the words were jumbled.  Certain letters were replaced by other letters, and where there was empty space there were exclamation marks.  I TRIED to start normally and it blue screened.  I tried again in safe mode.  It worked and I did a system restore to 2 days ago.  Now I can't even get the computer to turn on.  I start it, hear the fan start up, but it stops a second later.  I also don't hear any of the CLICKS it MAKES when it's working.  The light turns on to show that it's on, but it just doesn't do anything.  The moniter starts up, but it turns off right away.  Help?

Edit:  I tried starting it again and everything was FINE for a couple minutes, then the monitor shut off.  I could still hear the video was watching so I think it's the monitor now?Sounds like the monitor is your primary SUSPECT for now. The easiest way to find out whether it is broken or not is to borrow a known working monitor or try your monitor on a different computer.