Computer does not boot or post.

[Gast]

Alright the hardware.

400watt power supply
WinFast K7NCR18D-Pro
2 processors (AMD XP 2100 & 2400)
Varied types of ram (PC 2100 & 3200)
ATI 9600xt AIW

I have reset the BIOS.

Here's what happens when I try to boot. The power comes on for about 1-2 seconds. The fans whirr and all that. Then, without posting or a PC speaker beep, the power cuts off. It does this every time I try to boot up the computer. I've tried it with and without the graphics card, and I still get the same result.

What do you think?

Edit:

Ah, sry. Let me make something clear. I have tried both of these procs in this motherboard. Only one proc at a time. Same goes for the ram.

I have everything disconnected besides the power button, pc speaker, 1 proc, 1 stick of ram, and (sometimes) the video card.

 

[WildHorse]

Suggest making a double-check that your cpu cooler fan is properly connected to the header on the mobo.

When I experienced the problem you're having it was because bios was shutting off power as safety measure to prevent cpu overheating.
I had failed to make a good connection of the cpu cooling fan to the mobo.

 

[Gast]

Well my fan cooler was conneted to the header, but it only has the polling? (the yellow line that tells the speed/rpms) line as it draws power from a 4 pin adapator. I tried connecting a northbridge fan (only other 3 pin fan I have) and it still just cuts off w/o posting.

 

[montag451]

Have you got the cpu heatsink placed correctly?
Can you disconnect the power button and trip the header with a screwdriver.

But, to be honest, the last time I had the same problem as you - I did everything i could think of, and ran mobo diagnostic card, RMA the mobo - new one was fine.