Question about Apple Cinema Display 23" HD Monitor
Now the light signal is one short, one long and one short again and that repeats... when connected to my Mac Book Pro the laptop has a black screen and when I disconnect the Cinema Display the laptop screen comes on.
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.
Posted on Oct 27, 2009
I am having these morse-code blinking power light issues with my cinema display right now. I just found the 3 top blinking patterns and what they mean on Apple's site: http://support.apple.com/kb/HT2811
Posted on Feb 24, 2010
The root cause of the problem is due to bad 3.3V Voltage regulator VR3 on the main board, it is putting out more than 3.3v which caused the mointor sensing circuits which is use to find out if the correct power supply is being used with monitor to malfunction. If you do not change the regulator, it will cause more damage since the voltage will be too high. Taping off the pin is a band aid fix but more damage will occur.
Posted on Jan 13, 2012
I thought you were "full of it" when I read this post but I figured what the heck, might as well try it. It worked!!
Thanks for the unorthodox resolution. :-)
Posted on May 19, 2011
This sounds like a backlight invertor error! it means it could go soon and is expencive to fix.
bit of help here, different screen but same guidelines:
Posted on Jan 11, 2009
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Posted on Jan 02, 2017
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