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  1. #1


    Member Since
    Sep 03, 2009
    Posts
    8
    Thunderbolt monitor goes blank for a fraction of a second
    I have a Mac Pro (late 2013) and an Apple Thunderbolt 27-inch monitor, running 10.10.4, and as far as I can tell, the firmware is all up to date. Starting a few months ago my monitor will suddenly go black for a fraction of a second at random moments. It happens several times per hour, typically. Suggestions? Thanks.

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    49,270
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    Have you tried a new cable from the Mac Pro to the Thunderbolt monitor? Also, is your Thunderbolt monitor still under warranty or extended Apple care?

  3. #3


    Member Since
    Sep 03, 2009
    Posts
    8
    The Apple monitor's Thunderbolt cable is built in; i.e., there's no way to swap a cable.

  4. #4

    vansmith's Avatar
    Member Since
    Oct 19, 2008
    Location
    Toronto
    Posts
    19,782
    Specs:
    2012 13" MBP (2.5 i5, 8GB)
    Is the connection good with the computer? It's very possible that the issue here is simply a loose cable.
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  5. #5


    Member Since
    Sep 03, 2009
    Posts
    8
    Indeed, switching the cabe to one of the other Thunderbolt ports fixed the problem! I haven't convinced myself yet if one of the ports is bad or if the connection was just flaky, but the intermittent screen blanking is gone. THANK YOU.

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