Question about Apple Cinema Display 23" HD Monitor

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Monitor will not power on

I recently acquired a used (but in very good condition, came from a TV production) Apple CinemaDisplay HD. At first, it worked fine. Suddenly, it would not turn on (ie the screen stayed blank) despite a blinking white indicator light. Now, it will not power on at all. I tried replacing the 90W power supply with a new brick, but it still doesn't work. Is there a way to fix this? My first guess is there is a problem with the embedded/power cables.

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The best sway to deal with apple products is to bring it to apple themselves......9 out of 10 times they will fix it for nothing

Posted on Jan 22, 2013

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6ya6ya
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Posted on Jan 02, 2017

SOURCE: blank screen (Apple Cinema HD 23"LCD)

Had a similar problem with similar symptoms. Try unplugging the firewire and usb. Might help for a while. It did for me. In the end I risked the price of a new power supply. That fixed it and my 23" has been working fine since. Have to order the power supply directly by contacting Apple's service people. I found no other way to get one.

Posted on Sep 14, 2008

  • 3 Answers

SOURCE: Apple 23" HD display screen is black, power is on...

you need to open it up and replace the backlight(s), you will be quoted nearly the price new to get this fixed. might aswell bin it or eBay it! you intrestedin selling it?

Posted on Jan 11, 2009

  • 2 Answers

SOURCE: apple 23 monitor 3 blinks and then pause, top screen is dim.

I have an older 20" display. I have had this same problem on occasion, and coincidentally, just experienced it again this morning. It seems to occur after I do an OS update. I powered down the computer, disconnected the display, reconnected by pushing firmly into place, then powered up. The flashing stopped and the display works fine. You might have a different problem, but that simple solution worked for me.

Posted on May 14, 2009

  • 1 Answer

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

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power supply and it is good. I bought a main board from ebay. I still had the
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thanks

Tommy

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power supply and it is good. I bought a main board from ebay. I still had the
same problem so I returned it (minus a 15% restocking fee). I read somewhere
that you have to have the usb cables plugged into the computer for it to work.
Is this true? If so I may have returned the part I needed to make this monitor
work. (just my luck) I bought this monitor for $25 used off craigslist. I am
really excited to get this working. I have heard great things about how
fantastic the dispay is. I am ready to do some gaming on it. I am an electronic
technician but not so familar with this apple monitor. I figured I would turn
to this forum to learn from some apple experts out there. Any imput would be
wonderful in troubleshooting my problem.

thanks

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1 Answer

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