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  1. #1

    Member Since
    Jun 22, 2007
    Intel iMac brightness/power management problem

    I have a problem with my iMac which I hope to address. My machine is an Intel based the entry level iMac 1.86GHz Core Duo system with OS X Leopard 10.5.5 installed. This problem has been present every since I had ordered the used machine, and installing various update seems to have did nothing to address the issue. The problem occurs when ever I schedule the Mac to shutdown/restart. After I turn it back own, the screen’s brightness is turned all the way down, and I have to manually adjust screen’s brightness to its original settings.

    Is this a know issue with iMacs, and if so is there any way to fix this problem? Thank you.

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Fort Worth, Texas
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, El Capitan
    Read the following Apple KB article. Try the procedure given in the article and let us know.


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