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MacBook turns off abruptly, can't find what's wrong


I have a problem with my Macbook Pro. About 5-6 times a day, it turns of and restarts. It shows an error screen and shuts down.

I've tried formatting it, tried both RAMs one by one, tried resetting everything Apple recommends and now I've put a temperature monitoring software, that shows that my CPU temperature is idling at 80 Celsius degrees. I don't what else to do.

Any ideas?

Update (12/01/2016)

Here is the error log that I get after I turn it on again.

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panic(cpu 2 caller 0xffffff7f846a5bce): "GPU Panic: [<None>] 5 3 7f 0 0 0 0 3 : NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xd2000000 0xffffff911c98b000 0x0a5480a2, D0, P2/4\n"@/Library/Caches/


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1 Answer

Chosen Solution

The panic call implies you have a bad VRAM chip (video RAM) or via path or solder joint. nothing to do with DRAM (system RAM).

  • Memory offset: cpu 2 caller 0xffffff7f846a5bce

Sadly, this will require someone with the correct equipment to replace the bad VRAM chip. Here's an image of the logic board: MacBook Pro logic board. The 4 Samsung K4J52324K1 VRAM chips are on the top edge.

I would replace the logic board which I think is the better option here.

Did the tech submit the crash report to Apple for a full debug of the crash reports? Hopefully before they put the system into Vintage status - Apple Obsoletes Mid 2010 15-Inch and 17-Inch MacBook Pros. As that would be the only way to know for sure.

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