Cinema display not working after upgrading to Mountain Lion
Since upgrading to Mountain Lion my 24" Cinema Display no longer works. Although it's recognised by the computer (MBP 15" non-thunderbolt) and I'm able to configure displays settings (resolution etc) the screen stays black.
I've tried it on a MBP running Lion and it doesn't work on that either anymore. I've also tried resetting the PRAM and fixing disk permissions.