This just happened.  Happily using my (old) Optiplex 360.  Suddenly I get the dreaded Blue Screen of Death.  Sadly, I did not note any of the error messages there.  I turned off the drive.  Left it for several minutes.  Push the button for re-start.  I can hear the drive powering up.  Some green lights come on.  Two beeps.  But nothing on the monitor.  Monitor says "No Input", goes to sleep.

I'm desperate for any suggestions anyone might have!

Thanks very much!

Peter