Previous 1 2 3 4 5 6 Next 351 Replies Latest reply: Jul 16, 2015 3:22 AM by Miawnus Go to original post
  • cef9 Level 1 Level 1 (0 points)
    My 23" just stopped working this week.

    Monitor was flashing short-long-short LED code.

    Found this forum and tried the trick of using the W-shaped piece of paper trick. Basically, you just need a sliver of paper, about a 32th of an inch wide (I used masking tape...), and insert it into the connector to cover the middle pin.

    It's probably important that the piece of paper not tear when you connect the connector to the power brick. I had to do it a couple of times.


    Apple should definitely have a recall.
  • japl243 Level 1 Level 1 (0 points)
    too bad your display went down one day after my birthday

    the 150w power adapter is definitely a long-term fix.
    i ordered mine from great britain! but to assure you i also ordered a new cable from hong kong with no problem.
    just annoying to wait a month for it.
    my 150w adapter works with no problems over two months now.
    i posted this in the other message!

    good luck!
  • RancidIvy Level 1 Level 1 (0 points)
    Hi Everyone,

    Seems that this problem has been going on now for some time.

    I too experienced this problem with my 20" today. The display has been fantastic since I bought it new a few years ago. Turned off my computer today and rebooted, to my horror the screen stayed blank and showed the short-long-short power code.

    I know I'm pretty much repeating what many of you have said, but hoping that if everyone puts in their two cents worth, maybe Apple will consider some form of recall. Because now not only have I got no calibrated monitor to work with tomorrow, I am going to lose $$$ and potentially clients for every day that this monitor is out of action. And since Apple no longer make a matte cinema display, I'm sure that the only thing I can do is call AppleCare/Support and plead my case for them to fix it.

    In the meantime, am hoping my local retailer has a spare 150W adaptor laying around.

    Will keep you posted.


  • nplmdthfan Level 1 Level 1 (0 points)
    I have a 150W power supply on the way. Might be here tomorrow. Will stop back here once I've connected everything.

  • nplmdthfan Level 1 Level 1 (0 points)
    OK, the 150W power supply arrived. I did all the connecting, fired up the computer and there it was again, a living, breathing 23" Cinema display. I am happy once again.

    The only issue is that it is definitely darker than my 20" displays. I have the 23" and one of my 20" one side-by-side and the difference is startling. I went to the System Preferences to change the brightness but there is no control for it for the 23", only the 20". Kind of odd, eh?

  • nplmdthfan Level 1 Level 1 (0 points)
    I had a friend help with sorting out the darkness issue, so all is well there.

  • Bertolt Level 1 Level 1 (0 points)
    Thanks, it worked! I can't believe I just shoved a sliver of a metrocard into a $1000 piece of hardware. Apple should recall these 23" monitors. I already had to shell out money for a new battery for my Macbook Pro. The technician said that it was definitely faulty and not worn out, but I had to buy another one because it was out of warranty.
  • Bertolt Level 1 Level 1 (0 points)
    I did this and it worked, but now my firewire 400 doesn't work on either my laptop or my monitor.
  • Saveriuccio Level 1 Level 1 (0 points)
    solved my day!
    Thank You!
  • drrock200 Level 1 Level 1 (0 points)
    Great find. I just had the same problem as everyone else "short-long-short" after just moving my computer less than 5 feet. I was very careful in doing so. So I go to the apple store after ordering a new 90w, and no luck. For kicks we tried a 150w, and voila it works perfectly. The "genius" was going to order me a 150w, but at the last stage he said that he was unable to. It seems that because I didn't have a serial number for a 30" display you are unable to order a 150w power adapter. He left it up to me to find a serial number and that one from their floor would not work. I have been so frustrated not being able to get any help from apple support, they have never heard of this, and I have to find a serial number and solution myself. Makes me so angry. But finding this has given me a glimmer of hope. I did finally manage to get a serial number and ordered a 150w from the apple store, but I will hold off buying it if I can get the inverter trip to work with a piece of paper or something. You are the true "genius" for finding this cheap fix. Thanks to all for contributing to this thread.
  • drrock200 Level 1 Level 1 (0 points)
    PROBLEM RESOLVED: my monitor is working perfectly now. Thanks jakobeon for the cheap fix. Now I can go out and buy the new magic mouse with all the money I just saved.
  • tgibbs Level 1 Level 1 (70 points)
    Another success for the block-the-middle-pin solution. Problem was similar to what others have described. I needed to move my system temporarily, so I shut down my system and carefully unplugged my monitor and moved it to another room while some work was being done in my office. When I moved it back, I got blank screen with the short-long-short code. As it happens, I have two of these, so I was quickly able to verify that the brick was fine. Blocked the middle pin with a strip of paper and it came up fine.
  • samko Level 1 Level 1 (0 points)
    I just moved my Cinema Display from one desk to another and when I plugged it in again I got the blinking LED code. Having read the previous posts, it seems either moving the display would cause such a problem or it's a problem with the power supply. I guess most users, like me, have their display (power adaptor) plugged in since day one and any problem with the power adaptor won't show up until the next power cycle. I am going to try the "covering the middle pin" solution tomorrow and have my fingers crossed.
  • samko Level 1 Level 1 (0 points)
    The solution really works! If the middle wire is indeed a ground and the display detects a voltage there (as it shouldn't) and won't turn on the display to protect itself from damage, then there must be a grounding fault in the power supply. Since the solution works with at least the majority of the users here, Apple should take a look at the design or material used in the power supply. Like I said before, the power supply might become faulty after a couple days of initial use but most users won't find out until the next power cycle (either through unplugging the power supply or a black out)

    I bought my 20" display in 2007 and I don't think I have ever unplugged the power supply until yesterday.

    BTW, thanks a million to Jakobeon.

    Message was edited by: samko
  • tgibbs Level 1 Level 1 (70 points)
    It seems pretty clear that the problem is not with the power supply "brick." I have two identical monitors. When one started giving a blank screen with the short-long-short code (after turning them both off for a few days, then trying to bring them back up), the first thing I tried was switching the bricks. The working monitor worked with either brick. The non-working monitor would not work with either brick. Blocking the pin fixed the problem.
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