Hello Kevin. Names Sunny. There could be many reasons why you see a plain black screen when turning on the computer. One reason might be the monitor's cables (the power cable, etc) are not fully connected with the desktop, (I assume you are using a desktop). If that is the case, then you won't be able to see anything on the screen until you fix that, by pulling the cables out and reconnecting them. By the way. when you boot the computer, do you hear any beeps whatsoever?