HT202079: About Mini DisplayPort to HDMI adapters

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Antiboise
Level 1 (0 points)

Q: iMac to HDTV image issue

When I connect to my HDTV with mini display port adapter the image fills only a portion of the TV screen and is only a fragment of the desktop image.  Have I neglected to do something in the system preference display menu? If so, what?

iMac, Mac OS X (10.5.8)

Posted on Mar 4, 2012 4:55 AM

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Antiboise

Q: iMac to HDTV image issue

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  • by Frank Caggiano,Helpful

    Frank Caggiano Frank Caggiano Mar 4, 2012 7:28 AM in response to Antiboise
    Level 7 (25,782 points)
    Mar 4, 2012 7:28 AM in response to Antiboise

    If you look in System Preferences->Displays when the TV is hooked up do you see it in the list? Is it selected?

     

    What resolution is selected? How do you have the screens setup?

  • by X423424X,Helpful

    X423424X X423424X Mar 4, 2012 11:46 AM in response to Antiboise
    Level 6 (14,237 points)
    Mar 4, 2012 11:46 AM in response to Antiboise

    Make sure the resolution is correct (720p, 1080i, or 1080p). 

     

    Also what you are descripbing sounds like "underscan".  There should be a underscan (or overscan?) setting in the displays preferences for the tv.  Your TV itself probably has it's own overscan/underscan setting(s).  You will have to read its manual and look at the various menus.  Sometimes different manufacturers refer to underscan/overscan by different terms.  And it may not be a slider.  For example, my Sony has a "full pixel" setting for this.

  • by Antiboise,

    Antiboise Antiboise Mar 4, 2012 1:26 PM in response to Frank Caggiano
    Level 1 (0 points)
    Mar 4, 2012 1:26 PM in response to Frank Caggiano

    I'm at 1900x1200, and I tink the screen setup option is somethign I overlooked.  Will try again.  Thanks.

  • by Antiboise,

    Antiboise Antiboise Mar 4, 2012 1:27 PM in response to X423424X
    Level 1 (0 points)
    Mar 4, 2012 1:27 PM in response to X423424X

    I'm going to dig out the  Vizio manual and see what I may have neglected to do on that end.  Thanks!

  • by X423424X,

    X423424X X423424X Mar 4, 2012 1:34 PM in response to Antiboise
    Level 6 (14,237 points)
    Mar 4, 2012 1:34 PM in response to Antiboise

    I'm at 1900x1200, and I tink the screen setup option is somethign I overlooked.  Will try again.  Thanks.

     

    HDMI resolution for the TV may only be 1920 x 1080 (not 100% sure of this though).