Are diagnostic tests always right?

Discussion in 'iPad' started by Alugo123, Mar 22, 2018.

  1. Alugo123 macrumors newbie

    Mar 19, 2018
    Hi, so I already have a thread about what happened last time I visited the Apple store and how the genius refused to replace my replacement iPad Pro cause he and the manager couldn’t see the issue I was seeing and he ran a diagnostic but the diagnostic showed everything passed. I was having screen uniformity issues with all my iPad pros I had. I have my 4th replacement that still has uniformity issues where one half of the screen is a different white than the other and it’s a little distracting to read on like paragraphs and forums cause I notice the white slowly shifts to a cooler white when I get done reading a sentence so half the sentence is a warmer white and the other is a cooler white. I know the genius didn’t exactly do a uniformity test like my other genius did with my third iPad Pro where they draw rectangles with their fingers on different color backgrounds so maybe I’ll go to the apple store again and have them do that test on it again and have a friend of mine look at it and read on it and go with me so maybe they’ll be more likely to swap it if someone else can see it too. I don’t understand why some people are able to swap their iPad 10 times and get away with it but my other iPads I swapped , I swapped them at Best Buy. The 4th replacement is the first iPad I picked up from the Apple store so I don’t get it. I don’t drive cause of personal reasons and there’s no city bus where I live and I live with my dad so he drives me to those places but he thinks I’m too ocd so we argue. Isn’t the iPad suppose to have one uniform white instead of two different ones on the screen?? I really do love the iPad Pro , it has great vibrant colors for lcd and great sound and I want to keep it but I don’t know why every iPad Pro I had, has had screen uniformity problems , some worse than others but still there? I feel like there’s so many people in the Best Buy or Apple store that their getting all the perfect screens and I’m stuck with the bad ones. I’m out of my 14 day window , I lived with my 3rd iPad for a few months cause it wasn’t terrible but it was always distracting to read on. If I could drive I wouldn’t live with it and I do have Apple care. I wish I could get a refund and buy the perfect demo unit at Best Buy . Sorry this was a long rant but anyway why would the diagnostic show it passed if I can see issues with it?
  2. FeliApple macrumors 65816


    Apr 8, 2015
    My iPhone 7+ was clearly not good and it passed diagnostic tests. I don't know when do those tests actually indicate any issue.
  3. BigMcGuire Contributor


    Jan 10, 2012
    I think iPads have a lot more tolerance for variation than iPhones. I’ve had good luck with my iPhones but I’ve had light bleeding and super pink screens with my iPads (both replaced by Apple with no question / no tests). So I can’t really comment on the tests on their than...

    My wife’s iPhone 6s+ had rebooting issues and battery problems - the test the genius ran failed 3 times in a row, but he said verbally that there was nothing wrong with the phone and they could do nothing. They can deny service even if the tests fail (at least they did in my case). We got frustrated with this Apple Store, drove 2 hours to our usual Apple Store closer to our house and the Genius replaced our phone within 6 minutes we walked out with a replacement, no questions asked. (AppleCare+).

    I’m a lot less picky about my iPads because they definitely vary more. My current iPad 2017 has darker upper right corner. I’ve completely adapted to it and don’t notice it anymore. I hope to get 3-4 years of usage out of this thing. Sure, I paid $249 for this —- if I had paid as much as your iPad Pro I’d probably be singing a different tune.

    Sorry this isn’t a direct application but thought I’d share. I have also NOT had good luck with Best Buy. There is one 5 mins from my house - I’ll go here to buy stuff only, but I’ll drive 40 mins to this awesome Apple Store to do any work on my devices.
  4. 960design macrumors 68030

    Apr 17, 2012
    Destin, FL
    Diagnostics SHOULD always be correct. Having typed that, it does not mean the diagnostic is specifically testing the variant you are seeing.

    For example. I have 'normal' vision. I write the diagnostic to visualize screen variance within a tolerance level. That level is set by me or more likely some Apple stipulation of visual ranges. You may ( seem to ) be more tolerant to color changes than the diagnostic is written for or Apple has calibrated for.

    Had you written the diagnostic software, you could have pushed something up the line about how the tolerances should be a bit more tight. This may or may not have changed the actual calibration of the software parameters.

    I have owned every iPad made and have noticed no issues. I initialized over 1000 iPads last week and noticed no visual differences between them. This could be visual fatigue on my part or just that my color tolerance is much less than yours. You may have have seen over 50% of the iPads with variant displays had you initialized them.

    It would probably drive me crazy if the color kept fluctuating for me. I would certainly try a different brand of tablet.
    Good luck and let us know how it all pans out.
  5. Newtons Apple Suspended

    Newtons Apple

    Mar 12, 2014
    Jacksonville, Florida
    I am not sure the diagnostics will even detect a display not being perfectly even. How could it?

    I think after 4 replacements you have worn out your welcome. LCD screens are not perfect and never will be.

    The Apple store has to take a stand somewhere.
  6. Alugo123 thread starter macrumors newbie

    Mar 19, 2018
    What about the people on here that say their iPad pros are perfectly even all 100% white with no issues like dark areas or different whites whatsoever?
  7. Alugo123 thread starter macrumors newbie

    Mar 19, 2018
    I got to add that this ipad has a teeny tiny stuck pixel on the screen that i dont notice during normal use cause its so tiny and theres also a little light bleeding on dark background in dark room just like my other ipad that failed so i dont know if light bleed is normal or not for it to pass dianostic cause other people are saying their ipad pros dont have any light bleed but all ipad pros i had have had light bleed.

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