I've had a computer sitting around my house for maybe 3 years now, I had stopped using it because the power supply went and I couldn't afford to change it. That being said, I just recently bought a new one and replaced it. Now the weird part is, if I flick the main power switch on the back to "on" the PSU and CPU fans both start running. The disc drive opens and closes, but if I hit or even hold in the power button on the front, it will not shut off unless I hit the main power on the back. The moniter continues to say "no signal, entering power saver mode", no matter what I try. I know the moniter is good because I've tried it on 2 other towers. I've unseated everything inside and reseated it. Removed the CMOS battery for 2 minutes and replaced it. Double and triple checked all the connections. Pulled the GFX card, still nothing. Any help would be appreciated.