I have a Dell Inspiron 570 which is pretty old and one day I hit the power button and nothing. If I remove the ATX Power connector from the mobo and test the PSU, it comes on by plugging in the jumper. If I plug it back into the mobo, I hit the power button and the fans dont even flicker. My guess is that something on the motherboard has gone bad, but I wanted to make sure from others that it isnt something else. I would think if its the PSU, it either wouldnt come on, or it would atleast blip the fans when I hit the power button. I would also think that if it were cpu or ram, the fans would come on but it wouldnt POST. Any ideas?