I am after a little help as I think I have fried my fathers motherboard. He has a newish Asus motherboard and his old power supply broke and he ended up getting one of eBay. Anyway I went round after work one evening to change it over and I think I have made a big mistake the power supply he got had a 6pin connector which I plugged into the 8pin connector for the GPU marked EXT 12v. Upon switching the machine on the CPU fan span for a split second and then went off. Upon investigation I realised that I plugged in the 6 pin PCIe power connection in by accident as they are the same and it slotted in fine but aren't they different voltages etc?? Have a blown my fathers board?? I suspect I might owe him a new one.
What has happened is I have plugged the 6pin connection in from the power supply into the 8pin socket in the board marked EXT12v and now nothing is happening. There is a power button and reset button in the board and both of these are lit but when I attempt to switch the board on the CPU fan spins for a split second then nothing. Have I fried the board by plugging in a 6pin PCie power connector into the 8pin cpu connector or I have a shorted out the power supply. I have plugged everything back into the right place and nothing expect the led lights on the board and a slight spin of the CPU fan