Since I started using my computer again (after not using it for 3-4 years) when I turned it off and would try turning it on the blue light on the motherboard would light up but the computer would not start (or make noise/no fans movement or anything). I would have to turn the switch off in the back and turn it back on. Then press power. Well after coming back from Dinner with the wife today my computer did not start after the normal switch and power. So when I press power, motherboard lights up, nothing else happens. Is this the PSU failing or the motherboard? I took everything out. And made sure all the plugs were in tightly..