Adapting ATX Power Supply to an AT Power Switch

[bitSync]

I am trying to install a modern ATX fanless power supply in a special purpose 1999-ish CPU case. The Itox CB50-BX motherboard has both the P8/P9 power connectors (used by the original power supply) and a 20-pin power connector. The chassis has an AC rocker-type power switch on the front of it that is supposed to power up the unit, but the ATX power supply is expecting a PS_ON signal on pin 14 of the new 20-pin connector to start up the unit.

Is there a way to configure or modify the power supply such that it powers up when the front panel AC rocker switch is flipped on?

 

[Someone Somewhere]

Pull the green wire out of the 24-pin connector, and connect it to the rocker switch. Connect the other terminal to ground.

 

[leeb2013]

see here

http://jwenet.net/notebook/2005/1161.html

just connect one side of the switch to +5v standby or gnd and the other to PS-on

 

[maxwellmelon]

Pull the green wire out of the 24-pin connector, and connect it to the rocker switch. Connect the other terminal to ground.

+1

 

[maxwellmelon]

theres even http://www.atxpowersupplies.com/ATX-to-AT-Converter.php stuff like this out there

 

[Someone Somewhere]

Um, don't connect the power_on cable to +5VSB - it's already got a pullup resistor in the PSU holding it there. You need to pull it down to ground to turn it on.