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MacBook Air freezes and shuts off even when idle. OS reinstalled!

Hi guys,

My MacBook Air mid 2013 started freezing and shutting off. I rebooted, reset all SMC, PRV… nothing worked. I then erased everything and reinstalled the original OS (Snow Leopard). It didn’t help.

I then removed the battery and connect it only in energy. This worked and I assumed the battery was too old and I installed a brand new one. To my surprise, now with the new battery and new OS (upgraded to high sierra) it keeps freezing and shutting down.

It shuts down a few minutes after I start the computer - 5minutes. Sometimes it keeps going longer but sometimes it shuts off even 3 minutes after turning on and being idle… nothing running at all.

I installed iStats Menu to monitor temperatures and it seems like the computer is overheating. I get 60 c/140 f sometimes when it is idle. When I replaced the battery I also cleaned the fan and to my surprise the inside of my Mac Air that had never been opened in 5 years was extremely clean, except for a little bit of dust inside of the fan.

Do you guys have any ideas what could be wrong with my computer?

Thanks a lot!

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Given the systems age you likely need to clean and re-apply the thermal paste on the CPU. But I think your fan may not be working as it should have kicked in, did it?

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Hi Dan, thanks for your input.

The fan keeps silent when I start the computer and doesnt speed up at any moments. It is not broken beacuse I could manually set it to exhaust at 6000rpm and then I can usually work on the computer longer. What other checks could I do to make sure it is the therma paste that needs to be reaplied?

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Age is the main factor this system is on the edge and if the fan is working it puts this closer to the top of things I would just do.

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thanks Dan! Does it make sense that when I run the computer without battery it does not freeze and doesn't heat up? That is why I thought problem was battery related. But just installed the new battery to find out it is not.

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francoluigi_mendes さん、ありがとうございました！
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