Strange....
I have this 30" Cinema Display, it is connected to a 2008 Mac Pro. Recently I realized it was a kind of dark, I started to masses up with the brightness and it was at its fullest.
So today I connected to a 2009 17" Mac Book Pro because it has the same DVI port. Vuala! the display recovered full brightness. Now I plugged back to the Mac Pro and still as bright. Probably an internal issue of the monitor but very strange. I have been using it since 2007 and never had that problem with it.
I have this 30" Cinema Display, it is connected to a 2008 Mac Pro. Recently I realized it was a kind of dark, I started to masses up with the brightness and it was at its fullest.
So today I connected to a 2009 17" Mac Book Pro because it has the same DVI port. Vuala! the display recovered full brightness. Now I plugged back to the Mac Pro and still as bright. Probably an internal issue of the monitor but very strange. I have been using it since 2007 and never had that problem with it.