Hi, I built a computer a couple of years ago. It is an AMD 64 3000+ on a Gigabyte motherboard with a Gig of RAM. I leave it switched on most of the time but about a week ago, it totally crashed. There was just a blank screen and then it wouldn't boot up again. When I switched it on,the monitor wouldn't come on but everything else seemed to power up. Then a couple of days ago, we had to switch the house power supply off. Since then the computer won't even switch on and the temperature monitor has no power either (this is not connected to the motherboard). The wierd part is that the keyboard lights still come on, and when I press the power button, there is a little light on the motherboard that comes on. If I hold the power switch down, the motherboard light goes off again. Apart from that the computer is totally dead. It makes no noise at all. Any suggestions to what it could be?