I am connect a VGA Dell monitor to my 17" MBP with a DVI>VGA connector. It was working fine. I plugged it in for the first time in a week and now it wont work. The display goes on OK but when I connect it, the green power button goes orange and it goes into power saver mode. It tells me to hit the keyboard or mouse to work but I'm doing that and nothing happens. The computer is clearly detecting the display. It shows up in Displays in System Preferences and I can drag my mouse and windows to the other screen. The external monitor is just stuck in a black, power saver mode. Any thoughts?