Problem using Dell power supply

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Edward Young

Honorable
Mar 22, 2013
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10,510
Hello all
I just buy a Dell power supply model NPS-420ABA for my pc. After installed this power supply my pc won't start.
Just noticed that "special" power supply have PURPLE WIRE in pin number 20 (common is in number 9) and the PIN 9 is empty.
Someone have any idea to what I have to do?

Thanks all
 
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MauveCloud

MauveCloud

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May 7, 2010
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You probably got a Dell proprietary psu that's designed for use with Dell motherboards. If you used it with a non-Dell motherboard, it's possible you've already ruined both and will need to replace them, but perhaps not. If you're good at soldering, you can look up the pin-out for the ATX power connector in Wikipedia and rearrange the wires to match, if the total number of wires of each color matches (and the voltages for each color are correct, you might want a multimeter to check that). If those don't apply, you'll need to get a regular ATX power supply instead.
 
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