MacBook Pro won't wake up when external monitor and keyboard are connected
I am having the same problem with a new MacBook Pro where it semi-wakes up but monitor won't work. The lid is closed, external keyboard and mouse are connected and when you press a key, it 1/2 way wakes up (sound, but no video). The strange thing is it worked fine for months, and then one day it started doing this and I have to fiddle with it for 2-3 minutes by opening and closing the lid, unplugging and replugging in the DisplayPort connector. HUGE pain and can't figure out what changed.
Any help resolving this would be greatly appreciated.