I have a Forton Economy 250W PSU. I want to use it as 12V power supply only, so I removed all other wires (ATX,...) and fan - I used soldering iron or a knive - and leave only wires with Molex connectors. Now, I'm trying to turn it on, but if I connect something (CCFL, Fan...) to modded PSU, it will turn off... If I connect ORIGINAL fan, I can not turn it on (without fan it works - voltmeter shows...but i can connect only voltmeter) I'm sorry for my bad English, I'm not good at school :-/ Please help, what can I do? Oh, ****... I posted it to wrong section...sorry...how to move it?
Yeah, FireHed is correct. You need at least the green(PS_ON) and a GND, and connect those two. Then it should work.
I have connected green to black... But after connecting something to 12V it will turn off... If I connect ORIGINAL PSU fan to 12V, it will turn off too...
does it have enough load to start up? it could be that the 3.3, 5 and 12V lines share the same regulatorcircuits... when you load only the 12 v line the voltage on the other lines goes to high, activating over voltage protection... try loading the 5 v line aswell... COULD help...
Smilodon's right, most ATX psus need a decent load to check everything is working OK, otherwise they automatically switch off. About 1A on the 5V line is the usual recommendation (the Antec tester uses 5.4 ohm 25W) so a 4.7 ohm 10W resistor would fit the bill, or two 10 ohm 5W in parallel. They'll get hot, so don't let them touch melty stuff.
I have tested another Forton 250W Economy (the same...)... It works without 5V load, but that modded supply still don't work... If I connect something to 5V, modded PSU is turned off...
