hacking into a computer power supply

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pastadude's picture
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i am trying to get a power supply to fully come on and give enough power to power a hard drive without connecting it to my mother board i have had it to come on but supply power nope so please help

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Jon
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Exactly what ps? You may nee

Exactly what ps? You may need to have power draw from both 5v and 12v lines. Thus, if you are trying to power a 2.5" drive with it, you would only be using the 5v and would need something to put a load on the 12v.

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Short the power on lead, usua

Short the power on lead, usually the green wire, to ground (any black wire). The supply should turn on. If it's an old supply it may need a load of some sort to run stable.

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usually

Yeah, usually the green, but not always. It's not a good idea to rely on the colours alone. Compaqs and Dells especially are notorious for non-standard PSes. It would be safest to try and Google a spec sheet for the PS if possible.

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Shorting any other wire other

Shorting any other wire other than +5VSB to ground while the power supply is in the off state will have no effect. Shorting +5VSB will cause a brief spark and then shut down the supply. There is no safety issue though as 5V isn't enough to hurt you and 5VSB is current lmited.

Here's the official ATX color coding spec (scroll down):

http://www.pavouk.comp.cz/hw/en_atxps.html

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Dr. Bob
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Re: Shorting any other wire other

drbob wrote:

Shorting any other wire other than +5VSB to ground while the power supply is in the off state will have no effect.

Ahhhhhh..... Good point

/slaps forehead

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pastadude's picture
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thanks for the info

thanks for the info

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