Okay, several weeks ago my old motherboard blew up, so I decided to get a new board and processor.
I installed the new board (an Asus A7N8X-X) with an Athlon 2600 processor. Everything seemed to go fine. I booted it up, played with the bios, and noticed that it wasn't detecting my hard-drive. I changed some settings, restarted it. It booted fine and would read from the cd-rom drives, but still wouldn't detect the hard-drive.
I looked in the bios, changed the hard-drive detection back to AUTO, saved and exited. Now it refuses to boot. No bios beeps, nothing.
There's a power indicator LED on the motherboard that is lit, indicating that the board is getting power, but the only response I get from the board at all is if I unplug the power supply, wait, plug it back it and press the power button. The first time I press the power button after this process, the CPU Heatsink fan gives a weak little buzz and looks like it's trying to start up, but gives up quickly (maybe 1/4 of a second). Pressing the power button any more does nothing at all. If I unplug it though, I can get that weak CPU fan try, but that's it.
I've tried clearing the CMOS several times. The processor and board are brand new, and the fact that it was working fine initially makes me think they are good. I guess it's possible the processor failed, but I did a good job with the heatsink and used plenty of good grease, so I doubt it.
I was thinking it might be the power supply, it's only a 300w, but I tried unhooking everything so just the mobo would draw power and it still won't boot. Also, if there isn't enough juice, why did it boot the first couple of times?
Any suggestions would be appreciated, thanks.