Question about Apple Cinema Display 23" HD Monitor

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Apple 23" cinema display

My 23" Apple cinema display as gone dead and all I get is two (2) short and one long power light flashes.

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  • camron Malherbe Nov 24, 2008

    Exactly the same problem.  what is a faulty power brick?

  • CieloYLluvia Nov 25, 2008

    Same problem. My CD is connected to a G5, both purchased in 2005. When it was under Apple Care, they replaced the power brick (90w). This time, I purchased a new 150 W power brick on my own dime, and it still is dead. Sometimes it comes up, but with no rhyme or reason. I've tried all kinds of cable connect variations and zapped my prams. Still not working. :(

  • jotzet Dec 07, 2008

    it's quite strange that so many people have the same problem, since end of september... could this be related to mac os x 10.5.5? could this be related to a new product named Apple LED Cinema Display? i have a strong supsicion, that apple wants me to switch to a new display...

  • ATOMICBOY Dec 28, 2008

    I've got the same problem, as of today. It is the second monitor connected to my system. Switched the monitors to the other ports and it's definitely the monitor, not the card.

     It started out intermittently the other day. Wouldn't wake from sleep. Would have to restart. Then restart wouldn't work. Had to power all the way down and start it up again. Now nothing works. Disconnect it. Unplug it. Nothing.

  • Anonymous May 04, 2009

    Same problem. Replaced power brick. No fix.



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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


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Please do and verify any fuse blownout in the inlet of the power from the wall, if it is not visible then maybe you open the the back cover and try to see any parts that has error or blown. you should replace it with genuine replacement parts. however it hard to do this by a novice tech, My suggestion is to bring the unit to the nearest service center maybe the unit got warranty service or else maybe its a cheap or resonable cost.

may this help!

best regards, melnavz

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edit December 2016. Still working after 7 years.

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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