Approximately 3 days ago, I purchased a new power supply (evga 650w 80+ gold) to replace my old power supply (evga 500w 80+plus). During the three days the computer worked perfectly, the main reason was because my old power supply was underpowered, it would constantly frame drop & show foreign objects. Replacing it with the new power supply fixed all these problems. Its not turning on period, I tried to unplug everything, then plugging everything back together.