Shadow on Apple Cinema Display 27"

Discussion in 'Mac Accessories' started by DanielCoffey, Mar 13, 2016.

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  1. DanielCoffey macrumors 65816

    DanielCoffey

    Joined:
    Nov 15, 2010
    Location:
    Edinburgh, UK
    #1
    I have owned my 27" Apple Cinema Display since new in late 2010 and it has just suddenly (today) developed a linear shadow in the top right corner and all down the right side.

    I do not believe this is the "fine dust under the screen" issue that has plagued iMacs due to their fans drawing in dust or smoke as it has appeared suddenly and is more noticeable when the monitor is waking from sleep. After a prolonged warm up the shadow is a little less noticeable.

    I also don't think it is the same as the "loose gasket in the LCD screen drifting into view" which can occur in all ACDs and results in what looks like a foreign object in a hard band at the very screen edge. That can be resolved by removing the LCD panel and disassembling it to reposition the gasket.

    My issue is a slight darkening in the top right a short distance down and in from the top right corner with a firm inner edge and diffuse outer edge that continues down the entire right side of the screen to the lower corner. It feels to me like a backlight or backlight driver issue.

    Here is an iPhone pic of the top right corner, desaturated to show just the brightness difference. Ignore the diagonals in the left side of the image as they were from my wallpaper. The moire patterns are simply from resizing the image in GIMP.

    [​IMG]

    In this image I have used the brush tool to emphasize the inner and outer edges of the shadow...

    [​IMG]

    Now I am well out of AppleCare (3 years beginning late 2010) so I suspect this is not an economical repair as they would probably quote for a whole new panel.

    Opinions?
     
  2. chscag macrumors 68000

    Joined:
    Feb 17, 2008
    Location:
    Fort Worth, Texas
    #2
    You're probably right about it not being an economical repair. I've seen similar problems reported in another forum and they always resulted in Apple recommending the entire panel or monitor be replaced. And it looks like Apple is not going to produce a new cinema display any time soon. If you're handy with repairs you might be able to locate another display like yours on eBay where the display is good but not working because of a failed power supply. Always risky buying something like that though.
     
  3. DanielCoffey thread starter macrumors 65816

    DanielCoffey

    Joined:
    Nov 15, 2010
    Location:
    Edinburgh, UK
    #3
    I feel you are right. I think I will look at a Dell U2715H or possibly see if I can keep the ACD going till the U2717D is released.
     

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