I have took a computer out of my attic. The computer is at least 5 years old. When i hook everything up i turn the computer on. After that i look at the moniter and it shows a blank screen. When i use another graphics card which is a AGP. i hook it out i and i get power to it. but on the one that is on the motherboard it does not work. Can some one help me. It is an AMD processer.