[SLL] Hot-wiring an ATX power supply?

[Ralph Sims]

After some more searching I found a similar reference just before your post
hit.  However, I left the jumper in place to keep the power supply on all
the time.  Now the problem is how to mimic or replace the action of the
momentary contact switch that is normally used to power up the computer.
Basically I just want to plug this thing in and have it fire up--no power
switch needed.   Again the BIOS won't support "resume after power off".

> http://wiki.xtronics.com/index.php/ATX_Pinout
> 
> You want to short pin 14 (PS-ON) with a ground, and then 
> remove the short and it'll turn on. it's not just a simple 
> jumper. It's two state changes (short + removal of short).