Logic Board Reset for A1316 27" LED Cinema Display

Discussion in 'Mac Pro' started by tikku22, Oct 6, 2016.

  1. tikku22 macrumors newbie


    Oct 6, 2016
    Hi Folks...

    I replaced the Logic Board ($160) on my A1316 pre-Thunderbolt 27" LED Cinema Display with a "guaranteed brand new OEM board" (their words, not mine).

    I downloaded the EDID Reset Tool. However, when I run the tool, the "Reset EDID" button is grayed out (unclickable) and is asking me to "Connect LED Cinema Display to begin." I've tried unplugging / re-plugging / re-booting the display and CPU but no change. As a result, there is no brightness control, no USB, and no camera. Audio controls are working and the display is on without intermittent black-out issues (for now).

    Any suggestions on what to do to get the display working fully?

  2. h9826790 macrumors G4


    Apr 3, 2014
    Hong Kong
    May be you have to open it up again and check the USB cable connection.
  3. tikku22 thread starter macrumors newbie


    Oct 6, 2016
    Thanks.. I opened it up and, unfortunately(??), the USB was connected securely into the Logic Board. Any other suggestions? I agree, I think it's something with the USB portion of the system. Perhaps the All-In-One Cable that I have previously reported as being problematic? But this time, I just put in a brand new cable a few months ago and am surprised that it would go bad already.

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