How do I manually turn on an ATX power supply?

[W1zzard]

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[Unregistered]

Power supply turns on, but doesn't stay on

I combined all the 12vdc lines and ground lines. I shorted the green wire to ground, but when I switch the power supply on, it goes into standby after a few seconds. What can I do to keep it on indefinitely?

Thanks,

-D-Rock

 

[Hellraiser1981]

I combined all the 12vdc lines and ground lines. I shorted the green wire to ground, but when I switch the power supply on, it goes into standby after a few seconds. What can I do to keep it on indefinitely?

Thanks,

-D-Rock

The power supply shuts down if it doesn't receive a power good signal within about 3 secs. You need to short "Power OK", pin 8 on the diagram to a +5v line to keep the P/S operating.

edit: couple years later...
for the sake of accuracy....the motherboard receives the PG signal from the PS. Disregard this post.

 

[tom_johnson]

I have an OCZ modstream, by connecting the PS_ON to a gnd pin the power supply starts up fine but there is only 11volts on the 12v line. I checked to see if my multimeter was reading properly by connecting up the 20pin atx connector to a motherboard and the 12v line reads 12v as it should.

any ideas on wat could be causing this or how to fix it?

 

[Steevo]

Load the power supply.

 

[tom_johnson]

Load the power supply.

There was over 5A being drawn on the 12v rail and it stil remains 1volt down. Do i have to load up every rail?

 

[Steevo]

Sometimes yes, depends on the rail split though.

 

[rpg711]

u can also cut the ps on and solder it to the mobo ps on and it will turn on when the power button is pressed