ADC Apple Display only works by unplugging-replugging power source

I recently replaced my PRAM battery due to the following issues:
1. The ADC Cinema Display quit
2. I kept getting a "update time manually message
3. I lost connection with an external
I replaced the battery and it solved the external disk mounting, but I have to continually reset my pram by unplugging to get the cinema display to get it to work. I have reset the pmu button (for 1 second) . I have done an Apple/option pr startup pram reset. Funny thing is that it started up to the original drive. I have 3 drive slots occupied. The original drive is still in the same drive slot Don't know if this could be an issue.
Okay, I just did another restart after the screen went dead again. It didn't connect. I am unplugging, waiting 30 seconds, replugging, and waahla... the display is on. It just went off again after about a minute. I hit to on button and it didn't start. I disconnected the power this time and it restarts and the display is on. Anyone have a clue on this one?????

Allan,
Thanks for the reply. I'm running NVIDIA Geoforce4 T 4500 128mb, the original card. I have no usb cords plugged into the display. I never unplug it except in storms. I'm unplugging/replugging just recently to get the display to work. I have had the computer since 2002 and just replaced the pram battery yesterday. I'm not using any cable adapters. I have 2 extra drives installed in addition to the original ibm. All drives are ATA. Interestingly, if I zap the pram, as I did for the first remedy, it restarts not in my start up drive (WD 320), but to the original drive running Tiger (ibm 120). I'm thinking about changing drive slots, but I don't know if that will do anything, just a guess.
Steve

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Display only works when 1/4 open

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Recently I have noticed that my display wasn't working - I thought it was due to PGP encryption software that was required for work, however I was allowed to remove the PGP when I updated to 10.7.2 as it has full disk encryption.
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Yes, I'm sure it's not that. Startup will be ok and then screen will go black halfway through startup. Machine boots but no video with built in screen. Hook up to external monitor and can use OSX like that but with only the external monitor..not internal display. Also no "arragement" tab under display preferences...? And like I said will boot fine under windows xp with internal macbook screen. :/

ADC Apple Display only works by unplugging-replugging power source

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