Which s bad LCD or Video Card?

Discussion in 'iMac' started by ChrisA, Jul 8, 2012.

  1. ChrisA macrumors G4

    Joined:
    Jan 5, 2006
    Location:
    Redondo Beach, California
    #1
    How does one determine if a "banding" problem in the screen is a problem with the LCD or with the video card? Can the determination be made without swapping out parts?
     
  2. AppleNewton macrumors 68000

    AppleNewton

    Joined:
    Apr 3, 2007
    Location:
    1 Finite Place
    #2
    Try with an external display and if it occurs on there more than likely graphics. If it doesn't points more towards LCD, but don't rule out bad graphics.
     
  3. ChrisA thread starter macrumors G4

    Joined:
    Jan 5, 2006
    Location:
    Redondo Beach, California
    #3
    Thanks but I forgot to say this is an iMac, no easy way to hook up an external display
     
  4. AppleNewton macrumors 68000

    AppleNewton

    Joined:
    Apr 3, 2007
    Location:
    1 Finite Place
    #4
    No, i understood it was an iMac - just stating it could be a good way to verify if you had an adapter. id have an AASP check it out in the least.
     
  5. leman macrumors 604

    Joined:
    Oct 14, 2008
    #5
    Well, the real question is whether you have an external display or not. An iMac is as easy to connect to one as any other Apple computer ist — you just have to stick the cable in ;)
     
  6. spacedrabbit macrumors member

    Joined:
    Nov 7, 2011
    #6
    Take a screen shot:
    - no distortion on picture: LCD
    - distortion present on picture: graphics
     

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