Sporadic Booting

[ParaplegicSquirrel]

Starting Saturday morning, my computer decides it will only boot when sporadically. Most of time now, it will hang. When it hangs, it hangs right as I turn it on. All fans, cpu, and lights come on, but just hangs without anything coming up on the screen. There are a few times when it will start. I'm running an AMD64 3700+ on a Gigabyte GA-k8u-939 mobo with 2 gigs of RAM, Zalman CPU fan, Sony 710a, Samsung SH-S182M, Samsung SD-616, Compusa cd-rw, Creative Sound Blaster Audigy2 ZS, XFX Geforce 6600GT, USB/Firewire card, Nexus fan controller, Airlink 10/100/1000 ethernet card, Logitech Itouch keyboard and MX1000, Belkin 7 port usb hub, Dell A940 printer, Ultra X-Connect 500w and a Hanns-G JW199D 19 inch widescreen monitor.