Edson Brusque wrote:

>  Someone knows how can I hack the signal wire that the motherboard
> uses to turn the PS on/off?

  Hack?  Exactly how do you mean?

  Feed "TX POWER SUPPLY" into Google, and this is the first reply, as
was posted to the list previously:

http://www.compute-aid.com/atxspec.html

  It should allow you to identify the control wire (pin 14), and my
memory suggests it is violet - my previous posting on this should be in
the archives.

  I'd be interested (as may many of the list) to know what you find, and
what you intend to do.  One detail I have figured is that motherboards
in general default OFF.  If however you short the front panel button,
they default ON but of course you can't turn them off then.
--
  Cheers,
        Paul B.