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PSU wont jump start

post #1 of 8
Thread Starter 
Ok, I decided to start myself a little project that involves an old PSU i have, according to what i have seen online, you simply need to jump the green wire and the black gnd wire on the psu 24 pin ATX connector, well i did, but i cant get it to turn on, which is confusing because just about all PSUs have the same wiring

Can I get some help so i can continue my project?
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post #2 of 8
Okay you also need to put a 100 ohm 10 Watt resister on the [5 volt lead to Ground]. on some PSUs
Edited by Enigma8750 - 1/26/11 at 7:44pm
    
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post #3 of 8
You are right, paper clip connecting the green and black (any black, try a different one though). Make sure the clip is in all the way/making contact as it is iffy sometimes. Also, the obvious; make sure it's plugged in and the switch is on.

If all of this doesn't work then I'm lost.
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post #4 of 8
Thread Starter 
Quote:
Originally Posted by Enigma8750 View Post
Okay you also need to put a 10 ohm 100 Watt resister on the [5 volt lead to Ground]. on some PSUs
hmm perhaps, I will look into that, but according to the stickied guide on multiple PSUs, he doesnt mention a resistor
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post #5 of 8
Quote:
Originally Posted by raidmaxGuy View Post
hmm perhaps, I will look into that, but according to the stickied guide on multiple PSUs, he doesnt mention a resistor
He's joking. Don't do that. It would, best case, cause the SCP to kick in and shut the PSU down, or worst case cause the power supply to fail catastrophically. Plus 100W rated resistors are expensive.
post #6 of 8
Phaedrus2129 I was wrong on the wattage .. it is 10 Watts and 100 ohm resister. The ceramic Rectange Resister between the 5vdc to ground.
Some PSUs want to verify if there is a load in the Circuit before it will start up. I had one.



I connected lead 6 to common 15


Quote:
Starting a stubborn power supply

In some cases, a power supply may not start at all, no matter how much you coax it. In those cases, you will need to obtain a dummy load that simulates a device attached to the power supply. You can purchase a 1A resistor dummy load device with a Molex tail, all ready to be plugged in. You could also plug some fans or lights into the power supply to try and power it.

If a dummy load won't even start it, try plugging in a big device such as an extra hard drive or CD drive. If the power supply still won't start, it is probably broken, or some of the wiring (for the switch or short) is not making full contact.
http://www.directron.com/2powersupplies.html
Edited by Enigma8750 - 1/26/11 at 7:51pm
    
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post #7 of 8
Thread Starter 
Quote:
Originally Posted by bl1nk View Post
You are right, paper clip connecting the green and black (any black, try a different one though). Make sure the clip is in all the way/making contact as it is iffy sometimes. Also, the obvious; make sure it's plugged in and the switch is on.

If all of this doesn't work then I'm lost.
Yeah the problem was a weak connection between the two pins, i also forgot that the jumper needs to be in to sustain power

Thanks to all who made a fast response!
Edited by raidmaxGuy - 1/26/11 at 7:37pm
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post #8 of 8
Great.. Good sailing RaidMaxGuy.
    
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