try to unplug the power cord from the back wait a few then plug back in (I'm assuming you have NO power what-so-ever). If it comes on after that could be a ground/fault problem so the answer would be either a bad PSU or the MBD is grounding out to the chasis somewhere (solution to figure that out is take the mbd and cards out and lay it on a non-static inducing substance and turn it on). If it works its not a ground issue but more than likely a PSU issue unless of course the wall plug or strip is bad.
If you argue with an idiot he will drag you down to his level and beat you with experience.
I am not a fast writer.
I am not a slow writer.
I am a half-fast writer.