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2.2 GHz (Turbo Boost up to 3.4 GHz), 2.5 GHz (Turbo Boost up to 3.7 GHz), or 2.8 GHz (Turbo Boost up to 4.0 GHz) quad-core Intel Core i7 processor with 6 MB shared L3 cache and an optional AMD Radeon R9 M370X dGPU.

MacBook Pro a1398 mid 2015 restarts under gpu load

Hey everyone.

Super excited to be joining the community.

I've recently brought a macbook pro 15" mid 2015 without the dedicated gpu (820-00138).

It was a mess when I bought it and the battery was swollen to its limit. So I disassembled everything, cleaned the PCB carefully and removed the battery. It now turns on with the charger and I was able to easily install windows.

All seemed ok until I decided to do some stress testing. The issue starts when I try to do anything gpu related. As soon as I start a gpu benchmark, the system restarts and I'm back to where I started. CPU benchmark didn't replicate the issue.

Is it possible that the issue is related to battery not being in the system yet? I want to make sure before ordering one.

PS: I played 4k videos on YouTube and didn't notice the same issue.

PS II: I bought the item to start repairing as a hobby, and have no issues working on the motherboard as I have some basic equipment to work on it and try my luck.

Any help would be appreciated.

Cheers.

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As I suspected, no difference on MacOS. Still restarts on gpu stress test.

I've read about the 3 cpu MOSFETs that usually cause crash and shut down/restart the device which is a common issue with this model. but the way I understood it, they are a result of cpu idle mode not gpu under load.

Could they be related and these 3 MOSFETs are the issues here as well?

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Give this a try as it is a known bug:

1) reboot with CMD+R pressed.

2) open Terminal

3) sudo csrutil disable

4) reboot in normal mode

5) sudo mv /System/Library/Extensions/AppleThunderboltNHI.kext

/System/Library/Extensions/AppleThunderboltNHI.kext.BAK

6) reboot with CMD+R pressed

7) csrutil enable

8) reboot and forget about problem

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crwdns2944067:04crwdne2944067:0:

Thanks for your suggestion. I wouldn't think this helps or even doable as I'm using Windows 10 on the device. Am I wrong?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

do you not have a mac system installed?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

No but I will install it just to make sure. Since I have Windows, I don't think my problem is a MacOS driver issue anyways as the code I believe is suggesting.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

conveniently, I can't even install El Capitan for the reason explained here:

https://apple.stackexchange.com/question...

I'm going to stick with Windows anyways. Hope to get more suggestions from the community.

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Hello Naweed

Thank you for your post , I know it is been quite long time now …

I have got EXACTLY the same situation here in this days …

I disconnected track pad and isolated the boot loop and GPU kernel panick

Did you actually find out what was your issue…

Did you try Mac’s OS …?

Have a great one

Cheers

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Ciao

Would you please give some update to your issue.

I’m facing your situation in this days

Did you solve it?

Your help will be really appreciated

Cheers

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Hi. I don't quite remember to bo honest.

But I'm sure it was resolved without touching the logic board. I'm 90% sure it was the lack of a battery that caused the issue. Good luck.

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@naweed13

Thank you so very much anyway

Cheers

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Naweed crwdns2934231:0crwdne2934231:0
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