I just purchased a brand new 55' Samsung HDTV, LCD-LED, 1080p, 120hz. I want to use it as an external display with my 13' MacBook Pro. I am trying to do this with a Minidisplay Port > HDMI that I have used before. It worked previously on a 47' Proscan HDTV, 1080p, 240hz flawlessly, which is why this problem is very confusing. When I connect the two, the laptop recognizes that it is connected to another display, it even shows that it is Samsung. However, nothing shows up on the screen whether it is in mirror mode or not. I have tried to adjust the resolution settings, maybe I still have yet to find the right one, but nothing has worked. The laptop flashes the light blue screen that it does when it is connected to an external display every time, but nothing seems to change. Any solutions or help with this problem would be great, thanks.