Hi Robby:
I have the same issue with one of my Apple Cinema Display A1083 30" screens... suddenly (after a power outage 2 days ago) it constantly turns off by itself. I swapped power supplies, and connected it to a different Mac, with the same behavior.
Since Apple (or their authorized repair shops) will not work on these any longer, can you please guide me to where I can acquire the Apple 30" Aluminum Cinema Display A1083 Control PCB Board LM300W01 6870C-0129E that you mentioned?
Thanks!!
ToddS
tahoeths@cs.com
tahoeths at cs dot com