I have an acer aspire m1100 (all original) from factory state. This computer is roughly around 4-5 years old now. The computer powers on but only the cpu fan will run. I have tried changing memory to a known working stick and different working monitor. I have added a video card to check make sure it wasn't the on board graphics. I have tried another psu and nothing changes. I have a feeling its gonna be the motherboard but just wanted to make sure with people that know more then i do. Also should say that once the power button is pressed you carnt turn it back off from the power button after pull the power cord out which i know isn't good for it as it is.