ok someone help I'm stumped. friend gave me his old pc, has amd fx6300 cpu, asus gtx750TI gpu, 4 sticks of ddr3 ripjaw 4g RAM, and a MSI 970A-G43 mobo.. my problem is I cant get an input signal on my monitor. all in all ive checked the graphics card in my PC works fine. ive put my graphics card...