I had a power supply go. Ordered a new one, installed it. Still nothing. If I change the motherboard with an exact match, what else do I have to change or re-install?? Is it worth the trouble for a 4 year old computer? If not should I get a newer, better motherboard? If so what do I also need to upgrade? Or should I just build a new one from scratch and harvest some parts from the old one? Budget is a concern right now.