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{A1706 / EMC 3071}—Released in June 2017, this 13" Macbook Pro features Kaby Lake processors up to 3.5 GHz Core i7 with Turbo Boost up to 4.0 GHz.

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MacBook Pro 2017 13 - black lines on the bottom of display

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https://discussions.apple.com/thread/250...

I have this exact problem and Apple is not offering any help. Their display replacement program only includes the 2016, not the 2017 model.

What I want to know: Would replacing just the flex cable fix this? If so, can the cable itself be replaced, or does the whole screen need to be swapped out? And, if it is only the cable, does iFixit sell the right one?

Answer this question I have this problem too

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The Apple discussion space allows the collective Mac population to have a place to discuss things. Sadly, Apple tends to yank technical issues (as well as the people with proper answer) like yours as it brings quality questions out into the public space. The people who know what’s truly going on are not there! They are here!

So lets first define your issue: This is a scan issue within the display. This is not a cable issue so replacing any won’t fix this. FlexGate is when the backlight LED’s loose power giving a stage-lighting effect

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So what is this scan issue?? Apple altered the display design so part of the displays logic is placed within the main case so Intel CPU heaters! Kills the T-CON logic.

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Sadly, you need a new display assembly to fix this and to prevent it from happening again get this app TG Pro so you can monitor your systems thermals (and push it if needed).

I also recommend you clean the dust and debris out of your systems fans and heat sink fins so your system is getting the needed cooling, and lastly don’t block the vents! Don’t use your system on a bed or rug which suffocate your systems vents.

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