Studio Logic Board No Work

Hi,

I bought a Studio 575 logic board in 2004.

Recently, I replaced an old one with this never-used new board.
What happened then was all the displys lighted up, but no more.
I never plug this board on, so I guess it is out off electric capacity.
Or something wrong with this board?

Any one has any idea?

Thanks,

Li-Chiao
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