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2.2 GHz (Turbo Boost使用時最大3.4 GHz), 2.5 GHz (Turbo Boost使用時最大3.7 GHz)もしくは2.8 GHz (Turbo Boost使用時最大4.0 GHz) L3キャッシュで6 MBのクアッドコアIntel Core i7プロセッサ

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MacBook screen flickering and after while it freezes with blue screen

Hello i recently bought used macbook from internet

Works very find but when i use macbook sometimes screen flicker

i dont know what cause this but i didnt care about it(it happens 1~2times while using 4-5h)

but suddenly it stopped with blue screen or pink brown or some other color

It was working fine until last week so seller is innocent (at least i think so)

I tried nvram reset/reinstall mac os/smc reset/auto graphic change? Disabled

Is there some way to fix it please help me

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There are two versions of this series one with just the iGPU (Intel chip graphics engine) and the other with a AMD GPU chip. Do you know which you have? Here's a listing of this series:

If you take the bottom cover off you can see the difference in the heat sink as it will either only have one chip pad or two. Follow this guide to get it off MacBook Pro 15インチ Retina Display Mid 2015 下部ケース交換

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I think it is dgpu model

today it restart after freeze with white screen and it says macbook restart because of crash

I tried apple diagnostics but no error detected

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@suck24877 Can you take the bottom cover off and take a couple of good photo's so we can see, posting them here.

If you got a crash report that would be helpful when diagnostics doesn't pop an error. From the sounds of it it sounds like the GPU maybe failing or just overheating. Are you up to cleaning the logic board and re-pasting the thermal paste on both the CPU and GPU if present.

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@suck24877 Here is a video on how to do the thermal paste on the CPU/GPU. just in case https://www.youtube.com/watch?v=7912tmng...

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Suck さん、ありがとうございました！
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