No Power to PC at all

When I go to turn on my PC there seems to be no power. Motor does not run, Fan does not come on, no lights nothing. I have unplugged and tried a new outlet- still nothing. However when I do plug it in the green light on the mother board lights up and there seems to be some power coming in. does this mean anything? Did I fry something? or may it be the power lines in the case itself?