So recently I tried to put together a computer from old parts I had lying around at home for my brother. It includes an FX4350, biostar TA970, a gts galaxy 400 series, and 4gb of HyperX blue ram. When first using it, there were some stability issues (ex: gpu and cpu under load, the pc reboots), which was fixed by a power supply upgrade to an EVGA 500W. However, we are now getting no video output. Having tried both my personal 960 2gb, and the galaxy card, I come to the conclusion that it may be the motherboard or psu. There is no "no video input detected" message on the screen, it's just black. Could it be the card isn't getting enough power to display an image, or the motherboard is dead somehow?