Jarveye

Q: Cinema HD Display not working - flashing lights

Hi

 

Ii have two 23" cinema HD displays on the mac listed below. they have worked fine for ages, but today i turned on and one of the displays did not come on, instead the power light flashed periodically with a long pause then a short flash, long flash and short flash.

 

i have searched for solutions and i found this article for LCD displays:

http://support.apple.com/kb/HT2811

 

which stated that this kind of flash means the power adapter isnt working, but i tried swapping the adapted/power cord with the other display without luck.

 

this other article:

http://support.apple.com/kb/TA40898?viewlocale=en_US

 

which states it may be the backlight, but i wanted to try here to see if there was any other potential solutions, if not whats my best bet with getting it resolved?

 

 

things ive tried:

i tryed the problem display on it's own to make sure it wasnt a problem with having dual screens, it still didnt work.

 

I tryed swapping the power adapter, the adapter seemed to work fine with the working monitor, and the other one didnt help with the faulty display.

 

I tryed both display sockets in the back of the mac to make sure the connection to the mac wasnt the problem.

 

i thought the cable which runs to the display to the power adapter may be worth trying to swap, but while i thought this was removable i couldnt seem to disconnect it from the back of the display and didnt want to pull too hard incase i broke it is it fixed?

Mac Pro 2x2Ghz Dual Core Xeon, Mac OS X (10.4.11), 6CB 667Mhz DDR2 FB DIMM

Posted on Nov 23, 2012 6:32 AM

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Q: Cinema HD Display not working - flashing lights

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  • by Jarveye,

    Jarveye Jarveye Nov 27, 2012 8:14 AM in response to Jarveye
    Level 1 (5 points)
    Nov 27, 2012 8:14 AM in response to Jarveye

    Anyone?

     

    if theres no easy fix i need to know, i live in the shetland isels and getting to a apple tecnician is a bit of a problem... will probably need to ship it away...

     

    any advice much appreciated!

  • by elfstr0m,

    elfstr0m elfstr0m Nov 29, 2012 7:03 AM in response to Jarveye
    Level 1 (0 points)
    Nov 29, 2012 7:03 AM in response to Jarveye

    I had the same issue and appreciate your links, thanks. However the indication (short-long-short) was not accurate. I switched adapter with no luck, but when I switched to another 23" Cinema Display it worked fine as in your experience.

     

    There has to bee something else wrong with our monitors. I was lucky, we had two others standing around so I'm all set.

     

    I have no other information that might help you, sorry.

  • by Jennifer Street,

    Jennifer Street Jennifer Street Mar 29, 2015 10:39 PM in response to Jarveye
    Level 1 (5 points)
    Mar 29, 2015 10:39 PM in response to Jarveye

    Does anyone have any troubleshooting tips for this issue? My McBook Pro hard drive went down so i was without my computer for a couple of weeks. I just got a new one installed, got it all set up from my backup and now my display isn't working. I checked the display set up it is seeing the display but nothing is showing up on the screen. Any help is appreciated!