This problem has been haunting me for awhile. This computer has been down for about 4 months now and I've done everything that I could think of so far. One day while the computer was idling it had just turned off. I was not in the room when it happened so I did not hear/smell something. My first response was the power supply. transfered one that was working on another box, didn't work. I sent the mother board back to the manufacturer, they sent it back saying it booted up fine with no problems and checked all the slots. I then sent back the chip to see if it burnt out. Same response, works fine booted into os fine. I've tried using other switches, other power supplies, ram. I know all of these work because I used them in another similar x86 computer. The specs on the computer in question is: AMD Athlon k7 1ghz, soyo k7 via mobo, 46.1gb ibm hdd, 3.5" floppy, 16x dvd, 8x4x32x cdrw, 32mb diamond viper z200d vid card, turtle beach santa cruz sound card, generic 56k, linksys 10/100, 128 mb pc133 sd ram. This computer HAD worked perfectly for 8 months prior to this one fateful day. Now when I hit the power button, I get no response, no fans turning, no hdd spinning, nothing at all. It is as if the powersupply is dead, but this is not the case. I'm almost ready to take it to compusa and pay the 75 bucks to have a diagnostic of it. Any help is greatly appreciated. Also, I've used other power cords and ide cables. Thank you.