Power turns off when large power pin is plugged into the motherboard

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Arron2323

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Nov 30, 2013
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10,510
I was switching around motherboards to a different case and I noticed that once everything is plugged in, there is no power from the power supply to the motherboard. I then noticed that once I unplug the large power pin plug from the power supply, the power supply turns on. I wasn't able to see anything on the screen because I am guessing that the motherboard isn't getting it's needed power. My power supply (Thermalite 600W) isn't working right now for some reason, so I am using some crappy 400W power supply.
 
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Arron2323

Honorable
Nov 30, 2013
3
0
10,510


What worries me however is that the 400W PSU is what came with the computer with the motherboard. I didn't test it before I switched (dumb me), but I notice the green light on the motherboard comes on once there is getting power from the PSU (400W). It's just weird that when you plug in the big 16 point pin power plug that the PSU would lose power, but when everything else is plugged in (smaller 4 point pin plug to the motherboard) and it is not, the PSU turns back on o_O
 
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