I have a 3 year old 23" Cinema Display (Aluminum) and recently it's been coming up very light / white (see picture below). After sitting for a while, it eventually came back to full color, but I have a feeling it's no longer going to come back to normal in the near future. Has anyone every seen anything like this? What could possibly be wrong, and how can I go about repairing it (obviously it is out of warranty, and it is used to pro photography, so replacing it with the new LED display is out of the question)? --Thanks.