Black Screen With a Flashing White Line - any Ideas

Discussion in 'Mac Basics and Help' started by siam, Aug 8, 2009.

  1. siam macrumors regular

    Nov 1, 2007
    I have an iMac 2.8 24 inch, about Two years old running 10.5.7 , when I start the computer it shows the normal Gray screen
    for about 30 seconds, then the screen goes all Black , but with a small flashing white line ( _ ) in the top Left hand side corner.

    It just stays all Black for ever , I then hold down the On / Off button and turn off the computer, I then hold down the keyboard
    '' option key '' and press the on button at the same time , then I get the option to start from the main HDD , I click the Icon and the computer then starts normally , and every thing runs ok.

    Can some one please tell me what I have to do to get my iMac to start up normally again , Ive run Repair Disk permissions but the problem still occurs . Over the last few day's Ive been trying out a few new applications, so not too sure if this has any thing to do with this current problem

  2. yoyo5280 macrumors 68000


    Feb 24, 2007
    Melbourne, Australia & Bay Area
    Go in system preferences and check what your startup disk is real fast...

  3. killerrobot macrumors 68020


    Jun 7, 2007
    Looks like your startup disk has been changed.

    Go to :apple:>system preferences>startup disk

    Make sure you have the Disk that shows 10.5.8 installed on it.

    EDIT: Yeah! What yoyo said. :D
  4. siam thread starter macrumors regular

    Nov 1, 2007
    Thanks guy's , it was starting up from one of the applications I was trying out
    and not the main HDD

    Many Thanks :)

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