MacBook Pro Freezes with One 27" LED Cinema Display But Not The Other

Discussion in 'MacBook Pro' started by BlueGummiBear, Jun 11, 2012.

  1. BlueGummiBear macrumors 6502a


    I've got a very strange issue that I can't figure out. I've got a MacBook Pro 17" (2.53 GHz Intel Core i5 - 8GB DDR3) with OS X 10.7.4 all up to date with the latest patches and updates from Apple. I also have two identical 27" Apple LED Cinema Displays (non-thunderbolt models) that were purchased at the same time. When I plugin my MBP to the first LED (call it LED-1) it plays nice and works perfectly -- no issues with it powering on the display or freezing. Now, when I unplug the MBP, wait 2-3 minutes, and plug it in to the second LED (call it LED-2) it never powers on LED-1 and my MBP freezes with only the mouse cursor able to move. The light on the front of the MBP that usually "breathes" turns on solid. I have to hard reset it in order for it to come back. Now, once I reboot then LED-2 comes online and works perfectly. I've tried all sorts of things:

    1. Plugin the magsafe power first and then the mini-display port and vice-versa when plugging in LED-2.
    2. Don't plugin the USB cable at all on LED-2. (Note that both setups use the same model Apple keyboards and mice and have no other peripherals plugged in)
    3. Reset the SMC on my MBP.
    4. Plugin LED-2 before even trying to plugin LED-1.
    5. Plugin LED-2 with the lid open or lid closed.

    I've seen a lot of posts about MBP's freezing when displays are plugged into the mini-display ports but nothing similar to what I'm experiencing that I could find. Any help is greatly appreciated.
  2. BlueGummiBear thread starter macrumors 6502a



    Sorry for the blatant bump but with the new MBP announcement my post quickly got shot to page 2 so I'm hoping to get some more eyes on this for assistance.
  3. Ledspot macrumors newbie

    Jun 12, 2012
    I purchased a 12v colour changing LED light. I received the light, and the cable that came from it didn't have a plug or anything. I know that I need some kind of transformer to connect the wires to, but what kind of transformer do I need for it? I am in the Uk.

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  4. BlueGummiBear thread starter macrumors 6502a


    Wow. Spammers sure have gotten clever these days.
  5. LED Tube macrumors newbie

    Mar 25, 2013

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