Ever since i purchased my MBPro in june last year i have used external monitors on it while at work. When i arrived at work today i was having huge issues with the external monitor. To begin with the external monitor would not turn on at all. Once i was in OS X i was able to run the external monitor as long as i have the MBPro open. How ever it is only allowing me to run the external in the same resolution as the MBPro which is far lower than the external can handle. As soon as i close the lid the external turns off, then it enters a very strange cycle phase. The monitor will turn on for 2 seconds off for 10 on for 2, this just keeps repeating. Has anyone any ideas or is it a trip to the apple store?