I bought a used iBuyPower tower from a friend. It has been sitting around my room for a couple of months waiting for me to get a chance to rearrange the room to make space. I'm a broke college student and I dont have a monitor with displayport. I plugged in all my monitors into the single hdmi port on the GPU. I can't get an image. I tried over and over with different screens and TVs. I even unplugged the gpu and plugged a dvi cable into the motherboard. Nothing. All the lights turn on and the fans on the case and cpu spin. I have no idea what to do.