The Black Screen of Death
I have experienced several “KSoD” episodes with my Sony Vaio notebook computer. In my case, it seems to be related to the video card and has required at least switching from the external monitor to the computer’s monitor to see what I’m doing while trying to close applications, or hard booting the computer up to three times to get it to start up correctly. Haven’t been able to notice any pattern leading up to the problem and it has happened very infrequently.