Ok, I’ve got this p4 mobo (PC chips)and an Intel 1.5ghz CPU. I bought the machine as is at the time. I got around to checking it out, afer discovering the FDD cable was reversed, it seemed fine. I tested all the components and ran HD and RAM checkers…no problems. I go to close the machine and stand it up, The Green goes out and I have tried several known good Video cards I have on all available slots (all 2 of them)there is no AGP slot, just a small Video jack that plugs into a rectangular pin socket on the mobo. I know I had this problem with anoher mobo, but can’t remember how I fixed it. Oh, and there is no setting in the bios to disable the on-board video, that I can see. Any suggestions? And while Im on that subject, I had a few that won’t show video at all. How would I know if it is a bad mobo or a bad cpu without being able to swap them out? I use all known tested and working Video cards both pci and agp. Thanks!