Help? how 2 turn on AT power supply?

[KLUDE]

I got a really old 230W AT power supply with the P8 & P9 plugs. Even with the on/off switch, it only works when connected to the MB. How do i get it to work w/o the MB. I was only able to find instruction on how to get the ATX power supply to work. Nothing on the AT power supply. Please HELP! Thanks

 

[Carrot44]

<< Fog mode on >>

There is the power good signal that tells the MB that all is good maybe the MB needs to send something back?
Also it needs a load on it of some sort try a HD

Ken

 

[MajinWade]

I think something is wrong with it. Should work without the MB, at least the 2 i've used have.

 

[KLUDE]

Thanks guys, I connected it to the CD-ROM and it works GREAT! I guess the load of 3 fans is not good enough to turn on the power supply. Thanks a bunch guys.

 

[Floydian]

The old AT powersupplies just need a resistence on the 5 volt line, so a resistor between the +5v and the 5v ground line would work as well.

 

[bozo1]

Gotta be under load to work.