So I had this problem a few weeks ago, but then it went away. I turn on my computer and the fans go on, hard drives start up, but the screen is blank. I have an ASUS p4P800s motherboard w/ a P4 2.8ghz processor, 1.5gb RAM, ATI Radeon X1650 512mb video card. My video card is fine and my monitor is as well. Finally after a few tries, my computer booted up like normal. Yesterday it started again, and I smelled an electrical burning smell from my PSU. Today I went and bought a new PSU and put it in and the same thing is still happening. I think it might be the motherboard because everything has power but it seems as if the motherboard is not getting anything to start up. I cant open a CD drive, the lights dont come on for the CD drives or floppy, and I can feel/hear the HD's spinning. The mouse doesn't light up and there are no lights on the keyboard either like there should be when the computer starts into BIOS and whatnot. Do you think it is the motherboard that could be bad, I dont think it is under warranty anymore so that would mean a replacement (pain!). Any suggestions would be great! Thanks guys.