So, I have a samsung monitor, and an HP desktop, and when I plug the monitor in, it registers that it's plugged into the power source, but not into the PC. I have the power cord, and then the cord with the two blue ends on either side, but the blue ended cord on one end, has a tiny dent around the metal plug part, but it doesn't look big enough to effect it. Could it be the cord not working? also what is that cord called?