Question about Apple Cinema Display 23" HD Monitor

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Aple HD Cinema Display 23" is dead, no front LED light or back display light

The display is completely dead, The power supply is OK - 24V DC are coming into the main board of the monitor, on the middle pin of the power connector there is about 2.4V-2.5V DC. Even with middle pin disconnected the display is still dead. On the VR3 3.3V regulator, the in power is 5V and on it's output there is 3.3V - stable. The fuse on the inverter board is OK. What could be the cause and the solution. I'll appreciate any help. Many thanks.

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  • Apple Master
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Contact Apple support by phone 1 (800) 204-4427 US toll-free or chat, set up a repair, or make a Genius Bar appointment for iPhone, iPad Apple Mac Technical Support Phone Number 1 800 204 4427

Posted on Jun 14, 2017

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Posted on Jan 02, 2017

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Moozler
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SOURCE: Apple Cinema Display 23"

Hi all,
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 and it looked like a “W”. I gingerly
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 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

Posted on Oct 27, 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

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Blinking light on Apple cinema display usually indicates insufficient power from the power supply. Test it with another power supply from ANY cinema display (23" and 27" power supplies are ok to test with).

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http://tim.id.au/laptops/apple/displays/cinema_hd_display_23.pdf

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May 05, 2010 | Apple Cinema Display 23" HD Monitor

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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.

Jul 19, 2009 | Apple Cinema Display 23" HD Monitor

1 Answer

Apple 23" cinema display


thats supposed to mean theres a faulty powerbrick, however i have the same problem on mine and replacing that didn't solve it

Oct 28, 2008 | Apple Cinema Display 23" HD Monitor

3 Answers

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!!!!

Jul 28, 2008 | Apple Cinema Display 23" HD Monitor

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