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{A1706 / EMC3214}—2018년 7월 출시, 이 MacBook Pro 13”는 쿼드-코어 i5 및 i7 프로세서 그리고 Intel Iris Plus 통합 그래픽 포함.

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Why has True Tone disappeared after screen replacement?

Replaced LCD assembly (with correct 2018 screen) on MacBook Pro Touch Bar 2018. I noticed after reassembly that the Touch Bar is constantly on full brightness, and the keyboard backlight is always off.

While trying to troubleshoot the ambient light sensor, I went to check if True Tone was enabled or disabled, and noticed the “Automatically Adjust Brightness” and “True Tone” options have vanished entirely from Display Preferences.

What’s happened?

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What was the P/N of the display you put in and where did you get it? It sounds like you got the wrong display assembly.

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Thanks Dan. I believe it's 661-10037 but is there a way I can independently verify that on the actual hardware?

I've noticed the keyboard backlight settings have also disappeared from the Keyboard System Preferences window - even those that don't seem to rely on the ambient light sensor. The keyboard brightness buttons are still on the Touch Bar but don't do anything.

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What I can tell you is the 18/19 use a very different display than the older models. What happens is people use the older one 16/17 which is cheaper and if it came from a parts system will have the shorter backlight cable.

Here’s the correct display assembly:

This is what you likely got even though the P/N you gave me is the 18/19 Space Grey display assembly. The only other possibility the part was either mis-binned or the part was mis-marked.

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It's possible. The part was comprehensively labelled as an A1989 (rather than A1706) replacement, and looked in every way similar to the one I removed.

Is there any way visually or through the OS to identify which of these two the screen actually is?

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Sorry I don't of any way physically as the display assembly looks the same.

I don't have a system presently so I can't tell you if this works but you could look at the displays config info in System Report under About This Mac and then going to Graphics/Displays see what it tells you.

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Stuart Mc 이(가) 영원히 고마워 할 것입니다.
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