Intel iMac Monitor Problem

Discussion in 'iMac' started by ThkAsBrk, Aug 6, 2008.

  1. ThkAsBrk macrumors newbie

    Aug 6, 2008
    Esteemed Colleagues,

    My workplace has an Intel iMac with a frustrating problem.
    Upon booting the machine, the LCD display flashes a proper
    view of the login screen for about 1 second
    but then goes dark. When an external monitor is attached
    the external monitor works perfectly fine -- the
    only trouble being that the external monitor is not currently
    set to "mirror" so it is impossible to log in and access the
    machine. The IT dept at the institute has a monopoly on
    repair of computers and so the quick answer -- take it to
    Apple is not all that easy.

    Is there a way to:

    1) set the iMac to mirror display upon booting up by some
    clever key combination?
    2) set the machine to mirror by remote access and command
    line methods?
    3) mirror by changing something using target mode?
    4) or the obvious...somehow login using the real estate
    provided by the external monitor.

    Also has anyone seen this problem with iMac displays?

    An Intel iMac I think 2.16 Intel Core 2 Duo processor running Tiger.

    Thank You
  2. TEG macrumors 604


    Jan 21, 2002
    Langley, Washington
    The first suggestion I would give would be to restart holding the "shift" key. This will take some time. Then restart.

    Does the login screen have you enter a user name and password, or is it with icons that expand with a password field? If the former, can you not simply enter user name - tab - password - enter to login. Then bring up the Monitor Preference Pane by using Option-Brightness. Then try to change to mirroring either by the window that shows up on the second screen, or by attempting to find the hidden window and drag in onto the working screen.

  3. ThkAsBrk thread starter macrumors newbie

    Aug 6, 2008
    Tried Safe

    I tried to boot using safe mode...fine but there
    is still no way to access the login dialog box.
    (Safe mode does not fix this -- likely to be
    hardware related?)

    We have the iMac set up for User icon/password
    which makes it hard to just blindly click on
    an icon and hope to log in.

    When I boot up the machine there is a split
    second in which the log-in window is visible
    but it is too short to see where the cursor
    is and click a specific icon...I have tried.

    Again, no way to control mirroring remotely?

    Thank You
  4. TEG macrumors 604


    Jan 21, 2002
    Langley, Washington
    Not really. But if it is the icons, you should be able to start typing the user name and it will be selected, then hit enter, then enter the password and hit enter again.

    Also, if you can get a hold of the Hardware test Disc you may be able to test the hardware. Or if you are still under Apple Care, calling Apple may be a better solution to troubleshooting the problem and making sure it is a hardware problem. Then you can tell the IT department and they can get it fixed.

  5. fcanas macrumors newbie

    Feb 5, 2009
    "Again, no way to control mirroring remotely?"

    Here's a tool that could help the problem, although hopefully you have resolved this in some other way by now. It might be useful to those looking for help in the future though.


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