I have built a computer and have worked on it for almost two weeks now. I have checked and double checked all my conections and still can't get anything to appear on the monitor. I should at least be getting a screen to setup the bios. I know it is getting power and that there is a conection. The hard drive is working and I get a beep when I start up the computer but the screen is just blank. The power light just blinks. Any suggestions?