Basically and unfortunately, that means there's not much really you could do to test/repair in the proper way(s) as the link has shown.
You have some kind of hardware error - something is simply broken in the system.
I'd start with replacing the video card. If you don't have another, then physically remove the card you have, plug the monitor into the motherboard, then enter the bios and enable the onboard vga. If it doesn't crash at all like this, then you can know for sure the video card is the culprit.