Just connect the Green cable to ground (black) and the power supply goes on. Disconnect and it turns off.

Well there are ATX to AT adapters that have the green/black wires with correct connectors can be connected to your existing switch.

The AT adapter is plugged into the ATX cable so I would be able to do that...

Also, wanting to know how I could make this a permanent solution to keep the ATX supply in the AT case

Flip the ATX PSU on it's "head" and the screwholes align up. Allso..... You can make you'r own converter with long wires. Just search it on Google.

There should be a green and black wire pair coming from the ATX input side of the adapter. These two wires connect to the two terminals on the switch where the blue and brown (or white?) wires from an AT PSU would connect to.

There are no wires coming out of the adapter....they are all tied into it.....Goes from the ATX side to the P8 and P9 Plug-ins.

I can check if the green and black wires are there, but fairly certain they arent. They are two adapters I got a while back...

The adapter should expose two wires for the ATX soft power function, unless they're jumpered in the adapter (but that would be rude).

Here is what my two adapters look like....I got them a while back....

I suspect the brown wire is connected to pin 14. I can't see it clearly, but it looks about right in the picture.

I have seen something like that, on an AT psu in an IBM PC-330 486 machine. (that 3-wire thing on your cable)
On the other hand, you can allways buy a different kind of cable, as they are extremely cheap.

http://www.ebay.com/itm/20P-ATX-to-2-Port-6Pi … yYAAOSwJcZWg0DK

gdjacobs wrote:

I suspect the brown wire is connected to pin 14. I can't see it clearlyy, but it looks about right in the picture. http://www.sc […]
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I suspect the brown wire is connected to pin 14. I can't see it clearlyy, but it looks about right in the picture.

The Grey wire is connected to port 14....

Could I take that wire and the black wire and solder them onto the green and black wires from an AT Power Supply with the prongs and hook it up?

If so, there are 4 prongs on my power switch, which two prongs would I attach them to?

They also sell adapters with the switch already on it (green/black wires).

I snipped the switch off and soldered the wires to one of these

and mounted it behind the power button on my ATX case. It's not meant to be a permanent solutions, but it gets me by until I can find a proper AT case.

I guess you've thought of this, but since you've said you are installing into AT cases, not ATX, you could just buy an AT power supply as they are still made? https://www.startech.com/Computer-Parts/PSUs/ … ply~PS2POWER230

Smack2k wrote:

gdjacobs wrote:

I suspect the brown wire is connected to pin 14. I can't see it clearly, but it looks about right in the picture. The Grey wire […]
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I suspect the brown wire is connected to pin 14. I can't see it clearly, but it looks about right in the picture.
The Grey wire is connected to port 14....

Could I take that wire and the black wire and solder them onto the green and black wires from an AT Power Supply with the prongs and hook it up?

If so, there are 4 prongs on my power switch, which two prongs would I attach them to?

You need to connect pin 14 (the grey wire) to ground. I suspect the black wire is what you want, but please do check it first. Also, what's the brown wire connected to?

You can definitely use an AT power switch. Solder some spade terminals to the ATX_ON (grey) and GND wires coming out of your adapter, disconnect the old spade terminals from the switch, and plug the two wires from your ATX adapter into one side. You can use the hot or neutral side - that doesn't matter.

Brown is Pin 9
Grey is Pin 14
Black is Pin 3

Would the connections still be the same as you mentioned with Grey going to ground?
Brown would go to?
Black is Ground...

Thanks for all the help so far on this..

Brown will be unused. Just insulate it away.

Thanks for the help on this, it worked out good doing the wiring changes you suggested,...

Cool!