Cinema display won't come back from sleep

I have two apple displays - a 17" studio and a 20" cinema - hooked up to my 1.6 G5 (Tiger, all the updates). Several months ago the 20" started staying black after sleep. I worked around the problem by adding the "detect display" thingy to my menu bar and that would always bring it back up. Then it started going black when the computer wasn't even sleeping. Again, the "detect displays" trick continued to work, though it bothered me that it seemed to be happening with ever greater frequency.
Well lately that trick doesn't work all the time. And then I have to get down on the floor and physically unplug the display cable from the G5 which _usually (but not always) brings the monitor back up.
Since the connectors for the two displays are different, and I have no other computer to connect the display to, I have no way of knowing if it is the display or the computer or a software glitch or what. I live hundreds of miles from anyone who could diagnose this problem for me - has anyone else encountered anything similar?
thanks,
Lucinda

You are using an ACTIVE (powered conversion from Mini DisplayPort, and are having trouble with it.
Your card generates VGA directly, at the proper Voltage levels, and it may be more reliable that the method you are using now.
The VGA signals are on the bar at the end and one pin from the top row of the grid. I suggest you buy a DVI-to-VGA adapter and use it instead of the converter you are using now.

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https://discussions.apple.com/thread/2086442?start=30&tstart=0
http://www.youtube.com/watch?v=vodDfic8omA
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P9:
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C:\Users\mark\AppData\Local\Temp\WER2AC7.tmp.WERInternalMetadata.xml
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I feel like crying.
I bought my 1st Mac 3-4 days ago and I have not regretted anything more than this.
1st some mov files that Quicktime windows can play but Mac does not (feel like pulling my hair why as the videos with same settings taken with same camera before I got the mac work perfectly from flash drive.
2nd the nVidia 9600m stopped being detected no matter what I did, next morning it magically re-appears (alongwith many things that vanished magically for e.g. options on right clicking images never came)
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I close the lid, it goes to sleep. It has never come back from sleep. The screen will never turn on. Then I force shut down keeping power button pressed. And even after 2-3 restarts the screen doesn't come up. I wait for 2 min and then start. It starts working.
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Cinema Display won't wake from sleep

After reading lots in the forums I've concluded lots of people have the same problem that we are mistakenly thinking is specific to a particular monitor or Mac or behaviour.
Problem: Display suddenly does not wake from sleep - incidentally after an OS update and Cuda update.
Hypothesis: This definitely seems like a software problem as I've solved it in so many new ways. (Some people are replacing hardware!) Once fixed, the problem recurs the next time the display goes to sleep. However solutions rarely work a second time.
Solutions:
1. Zapping PRAM fixes it.
2. Deleting all displays preferences fixes it.
3. Safe boot and clear caches may have fixed it.
4. Pulling the Mini DisplayPort cable and blowing on it has fixed it. (I thought it was dusty since it worked. It may have just been pulling the cable.)
5. Deleting a power management preference in System/Library/SystemConfiguration/ fixed it.
6. Moving the power plug from one slot on a power bar to another fixed it. (***!?!)
7. Creating a new user account fixed it.
8. Now I'm stuck.
Please can help me think of a new way to fix it? If I can get it going again, I will simply keep the computer and 2nd display awake forever.

I have a new fix!
8. Launch Magic Bullet Looks app and fiddle with the display settings!!! Woohoo! I got it back again.
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Cinema display won't come back from sleep

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