At this point, I have;
swapped out the video card then Ram
tested power supply = Good
unplugged CDROM and Hard Drive then powered on
checked to make sure power button was not faulty
I get the same issue every time - no change.
After the pc has rebooted the second time and stays running, I have left it run for 10 minutes with no change. I hit the reset button and the computer does the same thing all over again...starts to boot, shuts down and restarts.