2.2 GHz (Turbo Boost up to 3.4 GHz) or 2.5 GHz (Turbo Boost up to 3.7 GHz) quad-core Intel Core i7 processor with 6MB shared L3 cache.

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MacBook Pro 15" mid 2014 suddenly shuts down

Hi,

So, my MacBook Pro has had this issue for a good while. I just picked it up again after 4 months of collecting dust, to see if its possible to fix it.

We´ve tried changing the heatsink without results. Or at least positive results.

I can be surfing in safari or playing CIV V which is the hardest thing this machine has ever done - and it suddenly shuts down without warning. I tried stresstesting it today both CPU and RAM and nothing happened, until the stresstest was finished, then it shut down. And then i can start the MacBook again, and it shuts down after a minute, or it can take an hour.

I´m kinda lost here, all help or propositions will be appreciated.

It is a 2.5GHz with 16GB and 256GB SSD

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I would start by digging a bit deeper diagnostically. Get a good thermal sensor monitor app like TG Pro as well as this free app CoconutBattery post screenshots of the main windows of the apps so we can see as well.

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I tried downloading said software but the Mac kept shutting down as soon as I opened safari. Took some screen grabs from console. I’ll see if I’m able to upload them.

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Here’s screen grabs of console shortly after crash and reboot.

https://imgur.com/a/EXgZs

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This is how it looks. Here the MacBook has been on for 5 seconds. After the screen goes black the fan starts working hard. 15 seconds later the light in the keyboard turns off.

https://imgur.com/a/xG6xe

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Did you reapply new thermal paste? if you remove the heatsink you must clean off the old thermal paste and reapply new thermal paste.

Como aplicar pasta termica

MacBook Pro 15" Retina Display Mid 2014 Heat Sink Replacement

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Como aplicar pasta termica

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Imagen MacBook Pro 15" Retina Display Mid 2014 Heat Sink

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MacBook Pro 15" Retina Display Mid 2014 Heat Sink Replacement

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@captainsnowball - Aiden you'll want to re-read what he did:

"We´ve tried changing the heatsink without results. Or at least positive results."

You're not offering a useful answer here.

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He did not mention replacing the thermal paste though.

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Yes, we removed old paste and added new.

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Screen grab from console.

https://imgur.com/a/EXgZs

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This is how it looks. Here the MacBook has been on for 5 seconds. After the screen goes black the fan starts working hard. 15 seconds later the light in the keyboard turns off.

https://imgur.com/a/xG6xe

por

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