Need AT power button.... where to buy ? \ VOGONS

Need AT power button.... where to buy ?

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First post, by bestemor

Posted on 2008-12-18, 18:43

bestemor Offline

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Anyone know someone who sell a powerbutton that fits this cable ?
http://cgi.ebay.com/ATX-20pin-to-AT-6-6pin-PO … 1QQcmdZViewItem

Yes, I noticed the other (very few) sellers which are selling a cable WITH a button,,, but I already got the linked cable, and the buttons in my AT cases all are non-modular(as good as welded on to the fat black cable...), so I can't use those...

And the number of recycled AT computers I can get my hand on, or regardless, are practically none.
(and they'd probably NOT have a modular button)

Boy, I didn't think testing should be this complicated - so damn hard to replace my older AT PSU's ... 😒

- Last ditch: any safe! way to start(and turn off!) my ATX PSU via one or both(?) of the black/green long cables in the picture ?
(having a dim memory of shorting some pins in a regular ATX would jumpstart it ?)

Reply 1 of 8, by h-a-l-9000

Posted on 2008-12-18, 18:51

h-a-l-9000 Offline

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I'd just solder it to the old switch...

1+1=10

Reply 2 of 8, by Amigaz

Posted on 2008-12-18, 18:55

Amigaz Offline

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h-a-l-9000 wrote:
I'd just solder it to the old switch...

The AT button is a "continious" button, the ATX button is just a "tick" button so I don't think it'll work.

I'm after this sort of button too...

My retro computer stuff: https://lychee.jjserver.net/#16136303902327

Reply 3 of 8, by h-a-l-9000

Posted on 2008-12-18, 19:12

h-a-l-9000 Offline

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At the power supply the green cable has to be connected to ground permanently to keep it on. The push-button logic of ATX is located on the mainboard, not in the power supply.

1+1=10

Reply 4 of 8, by bestemor

Posted on 2008-12-18, 20:35

bestemor Offline

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Ah, so that's why it is grounded... was wondering about that when trying to dismantle the original one...

Still, as there's no on-off logic on this AT motherboard, and I have no welding* skills(or tools for that matter), how does a working set-up of such an AT-ATX converter cable actually... eh, work ? 😊

Should you connect that green cable to ground somehow ?
It is a female connection of some sort('cable shoe'?), but I haven't seen anything resembling the male part anywhere - though judging from the pics of those cables WITH button, it looks like it's supposed to go there.

So, preliminary conclusion is: short the black to the green once, and we're on (power good), short it again, and we're 'off' (?)

Right.
I've now ordered a full new cable with button, but it'll take weeks to get here, so... And I really want to see if it is my PSU(same age as the MB) that is causing that disk problem, due to some hints in this thread;

Will ISA slots problems interfere with other motherboards functions?http://cgi.ebay.com/ATX-to-AT-Motherboard-Pow … 1QQcmdZViewItem

(*: and there are so many different colored cables stuck in that original button, which doesn't quite add up with my 2...)

PS: actually found a couple!, whith some 'clever' changes to my search...
The shipping costs are ludacris though, insisting on Intl Express mail... 🤑

http://cgi.ebay.com/DPST-AT-On-Off-Power-Swit … 1QQcmdZViewItem

http://cgi.ebay.com/Power-switch-for-AT-power … 1QQcmdZViewItem

Now, if someone could just tell me what those 2 other blade connectors are for...

And, while we're at it, this one looked intriguing for testing purposes:
http://cgi.ebay.com/Motherboard-POWER-SWITCH- … 1QQcmdZViewItem

Reply 5 of 8, by h-a-l-9000

Posted on 2008-12-18, 21:09

h-a-l-9000 Offline

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> So, preliminary conclusion is: short the black to the green once, and we're on > (power good), short it again, and we're 'off' (?)

Wrong. The black one IS ground. Green and black have to be shorted all the time for the PC to stay on. You could cut off the switch together with the cable from the old AT power supply and somehow wrap it's conductors around the green and black cable shoes.

1+1=10

Reply 6 of 8, by h-a-l-9000

Posted on 2008-12-18, 21:11

h-a-l-9000 Offline

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These switches are meant for AC mains and thus they are actually two identical switches in one -> four blades.

1+1=10

Reply 7 of 8, by Moogle!

Posted on 2008-12-19, 09:10

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I've always wondered why it took so long for PCs to get a soft power system, since TV's have been able to do this since the very early eighties.

Reply 8 of 8, by h-a-l-9000

Posted on 2008-12-19, 12:23

h-a-l-9000 Offline

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Compared to TVs and the ATX soft power the AT power supplies are not wasting electricity when "off". And you even had a plug to connect the monitor or other devices so those won't waste power either when the computer is off.

1+1=10

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