My friend built a computer about a year ago and now it stoped working. So I went over to his house took his ram,harddrive,GFXcard,Cpu,powersupplly,and put it all into my computer. And it works. But when it is in his computer,I turned on the power supply with out even pressing the start switch and it starts up just the fans We took his battery out of his mobo and laid the mobo on a peice of cardboard(for 2 hours). And it still don't work. Im guessing his mobo is bad because it's just letting power to the fans without the start switch even being pressed. Am I wrong? I need some help.