I've had an issue with my desktop for roughly the past two months. It won't turn on at all, the only sign of power is a solid green indicator light on the motherboard. I just received a replacement for it so that should turn out okay. I also just today tested my power supply, a Corsair TX750 to make sure it was running smoothly. It passed the paper clip test but I'm going to get a replacement from them just in case. Other than the motherboard and the power supply, what can be preventing my computer from turning on? The switches for the power button, reset, and HDD are set up correctly for sure but all the issues started to happen when I wanted to upgrade my computer and add a GTX 580 to it. It was a prebuilt computer, a Cyberpower PC Gamer Ultra GUA110, the case is http://azzatek.com/index.php?main_page=product_info&cPath=1&products_id=31 the motherboard is an M4N68T-M V2, video card is PNY GeForce GTX 580 Overclocked Enthusiast Edition, CPU is AMD Phenom II X4 855. The only issue I can think of is that the smaller side of the PCIe that my graphics card goes into, the graphics cards pins are shown very slightly. I'm not sure it would be a reason why it would cause all the problems the computer is having but any suggestions? Thanks in advance!