Apple cinema Display problem after update

I had a similar problem to lain Maclreud
Immediately after updating to 10.4.11 and rebooting the toparea on my cinema display went dim and I saw the 2 short, one lon blinks on my power display LED
I didn't try it on another computer yet or try to change my power source but I may need a new backlight card as well. Please post if you have had similar problems after updating and suggest possible solutions.

Have you tried the Command-Option-P-R keys to reset the PRAM? (Maybe the upgrade has messed up the display settings?)
http://docs.info.apple.com/article.html?artnum=2238

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