Could it Be. . .
Howdy, Stuck In Mobile.
I wonder if your Apple Cinema Display is the c. 2004 model. . . the one on a curved aluminum base with the Power Adapter (a white box) that takes several USB connections?
If so, could your problem possibly be related to a mix-up with the connexions?
Also, if it's a software glitch, you can go to the Utilities folder, load ColorSync Utility and run the (color) Profile First Aid scan to determine if there's an error somewhere in the system. If one is found then you should run the Repair option. But all your display profiles are there.
System Preferences/Displays/Color is where you want to go to check/change display options. There you can "roll your own." Tip: Go the "Expert" route and pull the first two little balls on the left adjustment slightly BELOW the horizon, leaving the rest alone until you get to Native White and Gamma settings. For a richer screen hue move those adjustments to the right of the default setting, using the slider.
Also check the screw that holds your graphics card in place; if the screw's loose the card may not be seated properly. That will definitely cause trouble. That's what I do when my screw gets loose.
Consider running a PRAM reset.
But it's knowing how spacey I get installing stuff. . . that a crossed-up connection would always be a distinct possibility when dealing with your type problem. It's usually the simple things. . .
My old flat screen digital monitor began suddenly going black a few years ago, and I found that jiggling the power plug at the back of the unit would temporarily restore the screen. But it would always go black again soon afterwards — and I could hear a rapid tick-tick-ticking coming from under the cover.
I finally mustered enough moxy to pull the cowling and then plugged the cable back in, with the naked unit sitting flat on my desk. The ticking seemed to be coming from a point at the bottom of the unit near the right-hand edge.
Yep; it was a cracked circuit-board, and current was arcing between the gaps. What a devolting revelopment.
Funny. . . the junk that can be pressed into service when all else fails. I'd tried soldering the crack; tried glueing the board at the place where the crack seemed to be (I couldn't actually see it — it would've taken a Magnaflux treatment to find it) — and finally, in despair wound up ramming 1/2 of a wooden clothespin under the edge of the board just to prop it up . . . and by gum, that did the trick!
Until each time the clothspin slipped a bit, that is.
Recently I broke down and shelled out for a new 20" Apple display with the little white box and all the wires. No mortgage, but almost. The old monitor's now collecting dust in the workshop, awaiting its fate. I don't miss it.
The new display has beautiful, sharp definition and brilliant color. I love it. It's this old c. 2003, 64MB graphics card that worries me now.
Knock on wood.
