computer suddenly doesn't turn on

[rhastr]

Hello Gurus -

So - I built myself a computer about 6 months ago.  Core 2 Duo E6850 4 gigs ram etc etc.  Everything has been working fine until i came home from work today...and the thing just doesnt turn on.  I hit the power button, nothing happens.

I changed outlets, and power cords and still nothing.

I need help figuring out if it is the actual case button, the power supply, or something worse.

Whenever the computer is plugged in, the green light on my mother board lights up, which leads me to believe the power supply is still pumping out some juice - and that the problem is with the case's "on" button.

Does anyone have any solution to try and figure it out...without actually purchasing a new power supply or case?

Thanks!

[patio]

Borrow a known good PSU of the same or greater wattage and swap it in there to see if this is the issue.
The MBoard light doesn't need a whole lot of juice so it basically tells you nothing.
Were there any symptoms leading up to this problem ?
Have you installed any new hardware recently ?

Post back with your results and we'll go from there.