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  1. #1
    Screen darker at the top

    Member Since
    Apr 21, 2012
    Location
    Chile
    Posts
    2
    Screen darker at the top
    Hey, I've got a 2007 iMac & when I turned it on today the top half of the screen was definetely darker... It's as if I had lowered the brightness for half the screen or something like that. Any clues on whay this could be happening?

  2. #2
    Screen darker at the top
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,250
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    Let's test it: Take a screen shot of your desktop. If the screen shot shows the same dark top and light bottom, the fault is probably with the graphics adapter. If the screen shot shows normal, then the fault is likely the LCD display itself.

  3. #3
    Screen darker at the top

    Member Since
    Apr 21, 2012
    Location
    Chile
    Posts
    2
    Then it's the LCD display. But after an hour or so it went back to normal again. Does that mean that my display is slowly dying? (Bc I was told this was not the first time it happened)

  4. #4
    Screen darker at the top
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    45,250
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    Sometimes as an LCD ages it can change characteristics - discoloring, shading, etc. It does appear that yours may be doing the same. Not much you can do to prevent it other than swapping out the LCD itself.

    You never mentioned the particular model iMac (screen size) in order to determine a replacement cost. Anyway, look here for approximate cost.

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