So, I came home tonight to find that the 20" Cinema Display for my QS is dim and the power light is flashing slowly. Restarted the Mac. No fix. Had to go out and decided to look it up a little later. I'm thinking backlight and while that could be an issue it wasn't in this case. I ran across a very simple solution from the Apple discussion forums in 2008. With only the money I'd use to buy a new backlight at stake I did the following. 1. Shut down the Mac. 2. Disconnect the ADC cable from the converter box (or video card if you directly connect). 3. Reconnect the ADC cable. 4. Restart the Mac. As the user who posted this advertised, it solved my problem. Putting this out there in case anyone on Google needs it or anyone here.