This happens about 33% of the time when I boot up my computer:
All the lights come on, all the fan start up, and then I wait for the screen to turn on but it never does. I look down and see that my RAM didn't start (I can tell because it is Ballistix Tactical Tracer and has lights).
I reset it and then usually it will work fine. Not really a major problem at all, but kind of curious and a little annoying. What could cause the RAM to not start like that?