My computer just shut off by itself last week. And it would not power back up. I stripped down the computer to the bare essentials, one stick of ram, video card etc... Through trial and error I have noticed that the PC will power up again but only if the keyboard is not plugged in. When I try to attach the keyboard in the off position, I start to hear weird fizzing noises. Nevertheless with the keyboard in, it will not power up. Also noticed that the floppy has no power to it. I cleared the CMOS JUMPER as well but that did nothing. I have an AMI bios. I got 1 beep followed by 3(although there was a very slight pause between the 2nd and 3rd). I have checked out AMI's codes and everything seems to point to the mobo. Has anyone ever experienced this sort of problem before. Do you think my mobo is the problem or do you think it may very well be that the power supply is creating this problem? Any input would be greatly appreciated thx.