Can using the wrong 4 pin connector in fry the motherboard?

Bought a used pc from some one and I took out all of the components since I was changing cases, i set up the hard ware and accidentally plugged in the wrong 4 pin connector. The port on the motherboard has 2 squares and 2 six sided shapes. The connecter that I plugged in was 4 of those six sided connectors. From there on out the motherboard has stopped working. When I power it on with just the 24 pin in, the fans and lights turn on, but when the correct 4pin connector is plugged it. The fans spin a few rotations and turn off immediately. Did I fry my motherboard? What can I do to fix it?
Reply to carsonrhodes1999
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    what does the 4 pin say ? does it say eps?
    Reply to superninja12
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