Those B&W mobos are a pain to get back to workTry unplugging both IDE cables, push 15+seconds on the pram button, etc...

Keep on trying various things, it may eventually come back to life but you won't undertand why (no one can)

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Thanks for your tips, I did everything that you said, but none of them worked.

just keep resetting the pram and pokeing around with it, eventually it will decide to work again
might also be worth unplugging everything, removeing the pram battery and leaveing it for a day or two, this got mine fireing again once (mine has done this 2 or 3 times)

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I'll do that, I disconnected everything externally and internally (IDE, front panel, PSU) and removed the PRAM. I'll let the Mac rest in this way for about two days or so, also, I ordered a new CPU just in case. You said that your Power Mac did this too, and only doing this he booted up again?

Thanks to everyone.