Question about Apple Cinema Display 23" HD Monitor

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Aple Cinema displlay 23" is dead, The 90W power supply is OK, The 3.3V regulator is OK, all supplies are there. What could be the problem? No LED light or screen backlight.

All supplies are OK, 24V coming from the 90W power supply is OK, on the middle pin of the connector I have 2.4V - 2.5V all the time. Even when the middle pin supply is removed, the display still does not start. On pin 1 on the VR3 regulator I've 5V DC, and 3.3V on it's output. Did someone come across the same problem, and what could be the cause/solution. Many thanks!

Posted by Anonymous on

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SOURCE: 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

Posted on Oct 31, 2008

Moozler
  • 3 Answers

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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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.

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