So I changed my graphics card and put my new one back in. When i start up my computer the Motherboard info show like normal and so does the BIOS. The Windows 8 logo shows up and it shows it loading. After it loads the screen goes black and remains black. The only thing I can see is my mouse cursor when i move my mouse. I don't know what the problem is. It could be the motherboard r the gpu. Someone please help.