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I have a Shuttle SN25P that won't power on at all - fans, no lights. The cable and power have been checked and the PSU switch is in the on position. I need to figure out if the motherboard or PSU are damaged, however Shuttle motherboards and PSUs don't use the standard 20 pin ATX connector/ 4 pin P4 connector. Instead they feature an "8-pin ATX3" and "6-pin CN5" connector instead.

Is there a way to test/power a Shuttle motherboard using a regular ATX power supply?

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Does it beep at all? does the PSU fan turn on? – soandos Aug 16 '11 at 17:50
You can always locate a pinout of the connectors, although it might take a bit of searching. Then short PS_ON to GRND and use a voltmeter to check the various outputs. – jcrawfordor Aug 16 '11 at 18:50

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