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Old Sep 24th, 2010, 11:48 PM   #1
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23" Cinema HD Display recognized but won't turn on

I have a near 5 year old 23" Cinema HD Display that was working fine until today. I was at work when the power went out at home, and it was hooked up to my sleeping MacBook Pro, but this evening the Display will nolonger start up. There are no flickering lights on the front of the cinema display and for all intensive purposes seemed to be dead...

...except that my MBP still recognizes it under the Displays menu and I can drag windows and move the mouse to the other screen BUT no dice.

I have tried unplugging all the cables from the Display, unplugging the power supply, trying a different 3 prong power cable (the USB/firewire/DVI cable to the display itself is permanently attached behind the screen itself).

No power. No lights. BUT still recognized on the MBP.

Restarted the MBP, disconnected and reconnected the Display, plugged in and unplugged the USB from the Display (which does not seem to be recognized by the MBP either - not good sign).

So I'm now down to 2 possible answers:
1) the 90W 'power brick' is dead or shorted during the power failure
2) the screen itself is fully dead/component failed

Any further ideas or insights beyond what I mentioned? I won't be able to try a similar power source until I get back to work on Monday to check the power brick.
Or has the display finally bid the pixel fairy goodbye?
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Old Sep 25th, 2010, 12:04 AM   #2
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Fixed? After some more tinkering may have found an odd solution - unplugging and replugging in USB cables on the back of the display sprung it back to life?! The USB ports are now recognized again.

I'll leave this post here in case others come across similar issues.
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Old Sep 25th, 2010, 12:08 AM   #3
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Quote:
Originally Posted by iSteve View Post
Fixed? After some more tinkering may have found an odd solution - unplugging and replugging in USB cables on the back of the display sprung it back to life?! The USB ports are now recognized again.

I'll leave this post here in case others come across similar issues.
I have the 30" cinema and I think you're correct about the power brick. I leave my computer on 24/7 because depowering the display means it may take an hour of tinkering to revive it--plug, unplug, switch to another power brick, etc. The same power outage killed my display today and I could only revive it by booting my MacPro with the display plugged into the graphics card's second lower resolution outlet. Once the screen starts up, I can switch to the proper outlet.

Hateful stuff.
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Old Sep 25th, 2010, 12:16 AM   #4
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Originally Posted by Macfury View Post
I have the 30" cinema and I think you're correct about the power brick. I leave my computer on 24/7 because depowering the display means it may take an hour of tinkering to revive it--plug, unplug, switch to another power brick, etc. The same power outage killed my display today and I could only revive it by booting my MacPro with the display plugged into the graphics card's second lower resolution outlet. Once the screen starts up, I can switch to the proper outlet.

Hateful stuff.
Hateful indeed - at least now know what to look for in the future if-when-it happens again. Thanks Macfury
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