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Original post by: Chris Green ,

Text:

you will need to conect the black lead of the volt meter to the ground cable pin(Ususaly Black) and one to the colored lead you want to test, but this is very hard to do, because the power supply has to be tricked into thinking it's on, so you need a 470OHM resister across the standby lead(ususally green) and to a ground lead, than test the voltages, the yellow should be around 12V, the Orange around 3.3V, and the red around 5V, the blue will be -12V, but the colors may be different, but that is the standard DC color coding.

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