When I connect my MBP to my 24" LED Cinema Display, some times the screen flickers and other times the screen goes black and I need to reboot my MBP to get it to work. Also, when I disconnect my MBP from my display and take it home, when I open the MBP the screen is black. It hasn't crashed because I can hear things happening when I click the mouse and press keys on the keyboard but the screen is black. Again, I need to reboot to get things working properly. I don't recall having problems before updating to Snow Leopard. Anyone else having this problem. Any suggestions about fixing these problems? Here are my specs. MacBook Pro 15" 2.53 GHz 4 GB Ram OS X 10.6.1 9400m/9600 GT GPU 24" LED Cinema Display Thanks!!