Question about Apple Cinema HD 30" LCD Monitor

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30" apple cinema display suddenly went blank.

I have a 30" apple cinema display that suddenly went blank. It happened while I was looking at it. The power LED is on steady but the screen is totally dark. I tried it with a different power brick and different machines - same effect. Could someone please give any hints what to look at and maybe where to take it for repairs? Just wanted to mention that I have been using it for 6+ years in a dual monitor setup with an identical display and it went blank right while I was looking at it. Thanks.

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It's probably the backlight. If you look very closely, perhaps using a flashlight, you might be able to see that it is still working but just not being lit up from the back. In that case it may be worth fixing, but if not, then it's probably past its useful life.
One other thing you might try is a different power supply.

Posted on Jun 14, 2014

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Posted on Jan 02, 2017

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SOURCE: Apple 23" Cinema HD Display went off

Hey - I just got done with 30 minutes of trying my cinema HD on my macbook pro and plugging and unplugging. When I plugged it into an extension cord in another socket the monitor started right up. I've had this configuration in my office for years with no problem...until today. Did mac send us a system upgrade that caused a problem with the monitor's power source???? Good luck!!!!

Posted on Jul 20, 2009

Moozler
  • 3 Answers

SOURCE: Apple Cinema Display 23" LED short-long-short flash prob.

Hello, I had the "short long short" blinking led problem with my 23" ACD after a power outage which left my screen blank and my cheek wet with a tear for my baby. I read somewhere that a guy was getting a 1 volt reading on the middle pin of his damaged 90 watt power block. I figured maybe the display might work if I could somehow block the middle pin. So I cut a small strip of paper wide enough to block just the middle pin and long enough to cover both sides, folded it to look like a "W" from the side. I then carefully pressed it into the brick receptacle with a toothpick leaving just a little slack so it would not tear when I pushed in the small white plug. It was a bit of a tight fit but guess what. IT WORKED! I am now enjoying my beloved monitor anew and saved $$$ on replacement brick or repair. If you want to try it and you feel you’ve nothing to lose, make sure you cover just the middle pin (both sides) and you may have to try a couple of times. It worked for me. I hope you have good luck too. Regards, Moozler

edit December 2016. Still working after 7 years.

***CAVEAT AND WARNING***
Use this fix at your own risk.
A faulty voltage regulator is probably the cause of failure. Voltage regulators can start a fire if too much voltage is applied.

Bud Martin's post below describes the electronic component failure that causes this problem. Thank you Bud.

Posted on Oct 27, 2009

  • 163 Answers

SOURCE: Apple Cinema HD Display 30'' black screen, power light blinking

I don't know what might have happened, but a number of years ago I had an apple monitor and the power light on it started blinking, so I got in touch with apple and they told me that it's flashing an error code, so they told me what the blinking indicated and fixed it.

So I think the blinking of the power light on your monitor could be indicating an error code so I suggest you call apple and they will identify what the error is indicating.

Posted on Feb 11, 2010

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