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モデル番号はA1708/EMC 3164。2017年6月発売。このエントリーレベルのMacBook Proには伝統的なFunction Keyが搭載されています（OLED Touch Barの反対)。

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Dark Horizontal lines on MacBook Pro 2017

I have a MacBook Pro 2017 non-touchbar.

My screen is having a horizontal lines in the bottom till the middle of the screen as it shown in the picture

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When I let my MacBook Pro runs for more than 4 hours the lines start to appear and within the time the lines get darker.

When I shut down the computer and turn it on immediately the lines get less darker and if I shut it down for some time the lines disappear.

What is the reason for this problem because I’m not even running a heavy application and it’s not overheating according to the numbers but somehow my fan constantly runs on 1200rpm

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It’s really frustrated that I spend above 1500$ and I keep getting this problems. First problem was my trackpad haptic feedback didn’t work for some time for no reason and now it works by itself

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I would check if that Fan Control software did not hijack the control of the fan, then perhaps will try to use another fan control software. since the readings for all sensors looks normal it will most probably solve conundrum with those 1200 rpm.

As for those lines - most probably the case of that famous here "delamination issue" of the T-CON board, though, are you sure your Macbook haven't been in the warm and humid place before? I mean even if you have to go to Apple with this problem to replace the display assembly, I would still suggest checking the water indicators inside your Macbook first.

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Ahmed Barahim さん、ありがとうございました！
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