When i press the power button on the pc it doesnt do anything like the computer isnt even plugged in, but theres a green light on the motherboard that is on. I have tryed almost everything to get it working iv replaced the power supply and i have even replaced the case of the computer and iv played around with the wires that connect to the motherboard from the front panel of the computer and it just turns on randomly and when its on and i turn it off it just switchs on and off on and off and have to unplug it,Im just really really confused i mean i havnt really got much experance with computers at all no one beleaves me at all that my computer is doing this, i really need help right now im just not sure what to do