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POWER SUPPLY FOR pc

I boret a power supply for my new PC, I yet conect my new case. to try the new fan, whit out my motherboar, but nathing apen, no ligth no fan, do you thing my power is bad o sure I have to conetc to my boar?

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  • argusa Dec 09, 2007

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Hi,

The simplest would be to connect the power supply to a motherboard since this is where the on/off switch is also connected. The power supply needs to be triggered on before it will operate. Plugging in power from the mains is not enough.

Alternately in most PC power supplies, you can try force triggering to turn it on with just your fan and lights connected. This is done by shorting the Green (or Gray in some) wire to the GND (black) wire on the biggest connector.

In most modern power supply designs, it needs a load across the +5V rail (latch on) to operate otherwise it will power on but then immediately switch off when it senses that there is no load connected. Sometimes this can be defeated by shorting the Orange (Power Good) wire to the Red (+5) wire.

A word of caution, some old Dell power supply as well as a few other brands do not follow the standard wiring color coding

Hope that this be of some help/idea. Pls post back how things worked out or should you need additional information.

Good luck and kind regards.

Hope that

Posted on Dec 08, 2007

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