Cinema display has lit on, black screen

Hi everyone-
I have been searching the forums on a fix to the issue I am having. I am currently using a 17" MacBook pro (2006) and have a 22" apple LCD cinema display (from 2002) as my primary display. I use both at the same time. I have never had an issue with either and originally bought my display brand new in '02. Just yesterday as I got back to my desk, I tried to wake my system up, with the MacBook pro running fine and the 22" keeping the black screen. The light stays on underneath however. After shutting down, restarting, unplugging, etc the screen would not work the way it normally does. Every once in a while the screen would turn on, but was dark. When the screen is black, the light underneath is bright. When the screen would display, the light was faint. It would go back and forth between on and dull and completely black. The light continues to stay on when connected to a power source. It turns off when disconnected from power, and no matter how long I wait to plug it back in the light turns back on.
Thanks everyone for your help!

That's what I thought the situation was.
With the 22" "out" and as your primary screen how are you able to run since the menu bar would be on the screen you cannot see?
I think, for the moment, you need to make your MBP your primary. Hopefully if you disconnect the external 22" (may have to reboot) your MBP should become the primary. Then go into the Displays system preferences and make sure it is the primary with the Arrangement tab (move the little menu bar on to your MBP screen in Arrangement).
Now, at least you can control the Displays prefs for both monitors. If you reconnect the 22" (again may have to reboot) click detect displays and gather windows to get the Displays prefs for the blacked out 22" on to your main monitor (which is now your MBP).
Check the resolution and refresh rate. If they are ok then again I still think there is something wrong with the 22". But it couldn't be definitively be determined unless you could connect that 22" to another machine.
After thought: Your definitions of "primary" and "secondary". Maybe they don't agree with my definitions. I specify the "primary" monitor as the one containing the menu bar. Is that your definition? If so my original question about how are you able to run without seeing the menu bar on the 22" stands. But it occurs to me that your definitions may be that you still keep the menubar on your MBP but just work with the 22" most of the time.

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Cinema display has lit on, black screen

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