motherboard burned up, need to know why, and I have a few clues
I just built a new computer with an nforce 4 motherboard, but when I pushed the power button, smoke came from the computer. The first step that I took was to find out which part of the computer got burned, and wasn't working. I unplugged everything except the cpu, cpu heatsink fan, and the 2 cords that come from the power supply tht go to a 2x2 pin square like slot, and a wide (10x2?) pin slot. The computer still didn't turn on when it was set up like this. Then I took the processor and heatsink out, and it still didnt start. I found out that the cord between the psu and the 2x2 power slot on the motherboard (which I think gives power to the cpu circuit) had a strange design where half way down the cord, there was a slot to plug something in, where if it wasn't plugged in, the 2x2 slot on the motherboard wouldnt recieve power. What this means is that the (as far as I know) cpu circuit didnt recieve any power. shortly after I plugged a new power supply in to the motherboard, and it didnt work, so I assume the motherboard is fryed. Was it the lack of power to the cpu circuit that burned the motherboard, or something else I did? I just want to make sure that when I get a new motherboard, and plug in a new power supply the same way, except this time giving power to the cpu circuit, something wont burn again.