Building a new PC.

I've had these components for awhile:
  • Phenom X4 9950 Black AM2+ 2.6ghz (quad, 64-bit)
  • Saphire Radeon x800 Pro, PCI-E
  • OCZ DDR2 PC2 6400 RAM
  • Seagate 10k SATA HDD
  • 500w PSU



I just bought:
  • Asus M3A78-CM Motherboard
  • LG 22X DVD-RW SATA


Assembled everything last night and when I powered it on, no video.
I first tried the on-board video (vga). I disconnected the HDD & DVD drives.
I also tried the graphics card.
still no luck.

I've built and rebuilt many PCs, and use a KVM, so I'm relatively confident it's not a monitor issue.

I rechecked the connections and everything appears to be getting power.