I turn it on, the fans and lights go on, then nothing!

[oscaryu1]

I doubt the CD was the problem, especially the computer didnt even get to booting from CD part yet.

 

[Cole_ie]

I doubt the CD was the problem, especially the computer didnt even get to booting from CD part yet.

Neither did mine. Just saying, it is worth a try. He probably doesn't have anything in there anyway, and since his circumstances are quite different, it is probably not the problem anyways.

 

[Cooner750]

I've got an old 650MHz AMD Athlon K7 Slot A machine with this exact problem. Tried everything except the PSU, which seems a likely culprit, as there has been a few times where it will shut back off again after pushing the power button (yes, i'm pushing it long enough).

Of course it probably didn't help that the CPU was halfway out of it's slot when I got the machine, but that was the first thing I fixed. Thankfully, with it being a Slot processor, there are no pins to get bent.

I did notice an immediate change in it's behavior after putting the CPU tightly back into it's slot. Before I did that, it would take about 3 seconds of holding the power button before it would power down. After putting the CPU back in properly, all it takes is one tap of the power button to turn it off, which, from other machines, like my HP, I know how they power down with only a tap of the button, but only before the OS is loaded.

 

[WestC07]

I would say the PSU as well. On our HP desktop, when it went out, with a press of the power button the lights to the machine would turn on, and stay on, but the machine would never boot up. If you left it off long enough, it would boot up to XP desktop, then go black.

Possibly your PSU is so far gone that it can't get enough juice to the GPU to allow it to send a signal to the monitor?

Try the power supply, that would be my guess.