Seem to have a weird problem here!! Was having trouble with the computer rebooting and shutting down. Sometimes it would run for an hour and then either reboot or shut down. It seemed to be running better but I appeared to have some kind of corruption with the operating system. After doing some redearch I uninstalled service pack 2 with the intention of reinstalling it. After I did that I would get a blue screen, so I decided to format. Put the disc in and nothing, all I get is a black screen and the green light blinks on and off on the monitor. I have tried a different MB, video card, four different ram sticks and a different cpu!!! I even put the setup in a new antec case with new Antec power supply.And all I get is that black screen!! I don't know what else to try?? I can't understand why it suddendly went to that black screen, I didn't really do anything for that to happen. Does anybody have a clue as to what the problem could be?? What would normally cause the computer not to boot and just go to a black screen?? HELP!! The MB is a KM4AM-V, cpu is XP 2500.