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iMac display turning off randomly with external monitors

1752 Views 24 Replies Latest reply: Jan 17, 2014 12:43 PM by mrbofus RSS
  • alisafromrus Calculating status...

    hi all

    will my iMac consumes less energy if i use a black descktop background

    ))

    thanks

  • enah Calculating status...

    similar issue. For me the screen is nearly permanently off but I can log into the machine using logmein - it is running fine. I am getting the following:

     

    30/08/2013 11:30:05.000 kernel[0]: RTC: Maintenance 2013/8/30 10:30:05, sleep 2013/8/30 08:44:29

    30/08/2013 11:30:05.000 kernel[0]: Previous Sleep Cause: 5

    30/08/2013 13:15:44.000 kernel[0]: RTC: Maintenance 2013/8/30 12:15:44, sleep 2013/8/30 10:30:36

    30/08/2013 13:15:44.000 kernel[0]: Previous Sleep Cause: 5

    30/08/2013 14:10:34.702 WindowServer[93]: handle_will_sleep_auth_and_shield_windows: no action for lock state 1

    30/08/2013 14:10:34.704 WindowServer[93]: handle_will_sleep_auth_and_shield_windows: no action for lock state 1

    30/08/2013 14:10:34.000 kernel[0]: Previous Sleep Cause: 5

    30/08/2013 14:36:39.377 WindowServer[93]: handle_will_sleep_auth_and_shield_windows: no lock state data

    30/08/2013 14:36:39.380 WindowServer[93]: handle_will_sleep_auth_and_shield_windows: no lock state data

  • enah Level 1 Level 1 (0 points)

    no change when sleep is disabled.

     

    Going to plug in a monitor and try a fresh install.

  • enah Level 1 Level 1 (0 points)

    It started on the 23rd of August after some updates - I am not sure if it's the update you mention. Ater that I upgraded to Mountain Lion - it's running the latest version available.

     

    Strangely the screen came on for two hours yesterday and then went again - despite showing no light on startup.

     

    It's an early 2008 iMac. I guess it's possible the screen is just gone, but if that were the case you would think there would be no response at all from the screen.

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