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A1706/EMC 3071—于2017年6月上市,这台13''MacBook Pro以可升级至3.5Ghz酷睿i7动态超频至4.0GHz的Kaby Lake处理器为特征。

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black bar at the bottom screen

Hi,

So I got this weird black bar that appears on the bottom of the bar only after using the laptop for a period of time, and it just getting higher since the first time it appeared!

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Did you get your system wet or have it sitting in strong sunlight at anytime?

hmm… Never got it wet and always use this system under the roof. The only thing that I think of that maybe the culprit is I’m using a third party USB-C dongle to connect to VGA second monitor (since the original from Apple is way too expensive) and this dongle has a very hard time to show the right resolution on the external screen, sometimes it also Interferes with my WiFi killing it.

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The backlight diffuser sheets are coming loose from the back side of the panel at the bottom so the backlight is not illuminating that section. You’ll need a new display assembly. There is nothing repairable here as the display is sealed tightly.

You’ll need to bring it into an Apple Store or authorized service center as this should be covered under a warranty exception! If you have AppleCare+ you’re golden!

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Oh…

The problem is nearest authorized service center is out of the town. Is there any chance this problem will expand? I mean getting higher from the current position (since I’m quite not sure if the height is increasing, since it always vary depend on the time I turn it on)

Will it get worse and be maybe sometime in the future around the half of the screen?

You know you can ship your system to Apple as well. The think is its about getting it repaired for free or paying out $800 US once the warranty expires. I wouldn't wait! Call Apple support and arrange for a shipping box be sent to you to get it serviced.

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Please explain more fully about the "warranty exception" This "bug" sounds like it is totally of Apple's making. I have this problem also and was told by tech support I would need to send it to an Apple service center, (as I am too remote on the island of Molokai, Hawaii to take it too an Apple store), with $500(!!) up-front, none of which would probably get credited back to me. My MacBook Air isn't even 4 years old, and I very painfully paid a bundle for it. I had my previous Dell desktop for nearly 10(!!) years. It had its problems here and there, but especially by allowing me to extend my service contract 3 times over, I was able to keep it going for that long of a time. This is my first Apple product---and it could very well be my last☹️.

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To start with you appear to have a MacBook Air not a MacBook Pro 13" Touch Bar system. So your issue while likely the same still is different as your system is much older - four years? Vs this system which is around a year old. So I doubt Apple would even offer warranty for it in any case.

Being in beautiful Hawaii does have its drawbacks, it is often humid and a fair amount of rain and it can be very hot! These environmental aspects is hard on computer gear!

While I understand your anger I don't see Apple offering much here other than replacing the display assembly as a standard repair.

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I had a similar problem however the lines were appearing at the top. However I noticed a few things it started happening on my MacBook Pro 2017 13” model after the Mojave update also it only happens when I have a black color themed application or a movie with black bars at the top and bottom is played for existing amount of time.

The solution I found was shut down the Mac for about an hour or switch to an application which has a complete white or any other color Interface for about an hour then it slowly goes away. Further, I took a screenshot shot on that the normal color apprears. It's an interesting issue.

I am not sure what the underlying cause is I have a feeling it could be something to do with both hardware and software.

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Not a Touch Bar model, but is this the same problem? 2016 MacBook Pro, approx 5mm black bar across the entire base of screen only noticed in recent days…

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