I'm building a computer and am having some problems booting up. I have an ABIT BP6 with dual 500 Mhz Celerons. When I boot up, it loads up fine. If I hit the power button, it immediately shuts down (without holding it down for 6 seconds like a normal softswitch). When I do that and try to start back up, nothing comes up and I get a siren sort of sound...two different tones alternating back and forth. While it's sounding off, I can hold in the power switch for 6 seconds and it'll shut off. This is weird because when it's running and I hit the power button, it immediately shuts down. But while it's going through this siren incident, in order to shut it down I have to hold in the power button for 6 seconds.
Anyway, after this siren happens and I turn it off...if I wait a minute or two and try again, it'll work fine. If I don't wait, it'll get that siren again.
Is this the motherboard or the power supply? Any ideas?