Macbook Pro will no longer detect external display My MBP will no longer detect external displays. It was working fine a few hours ago at work, I got home and plugged in the external display as usual and turned on the machine and nothing. Using the "Detect Displays" does nothing. I have tried re-plugging the mini DVI display port adapter and have tried using a different monitor with a different monitor cable. I have tried shutting down and booting without the adapter plugged in and then plugging in the adapter. Nothing works. Is there some trick to force my MBP to see and use the external monitor?

More Information: When I plug in the display port the LCD screen goes blue for a moment. Checking the Graphics and Displays display connecter shows
Status: No Display Connected
Try resetting the parameter RAM using these instructions

You can also try resetting the SMC using these instructions