Abrupt power off in windows / latest Linux.

From day one this Lenovo ideapad z70-80 has had issues with suddenly powering down in windows (7 or 10). I bought the laptop with the intent of mostly using Linux, so when Linux proved to be 100% stable I decided to keep the laptop and not send it in for warranty repair work. Even if I get it fixed, windows will never go on this laptop as being forced to use only Linux this long has shown me nothing I want to do actually needs windows.

What happens is in windows is after being on for a few minutes, the CPU fan kick in high, and then after a few more minutes the PC suddenly powers off. I can turn the PC back on right away like normal and start the cycle all over again.

In Linux, initially, it was rock solid. I was running Linux Mint 17.3 and had no issue. I updated to 18, the 18.2 again with no issues. Then about a month ago I decided to update all the packages to the latest version. The next reboot after that update brought the issue partly into Linux. If I cold boot the machine it is rock solid but if I put it to sleep then wake it, or change the power source, the CPU fan kicks in after a minute or two and eventually shuts down just as in windows.

I suspect something is faulty with power management as everything otherwise is normal with the computer. Temps I can measure are all within spec and the heat pipes are all clear and free of dust buildup.

If I could locate the power management ic I could try replacing that, assuming it is a surface mount chip and not a bga chip.

Thanks in advance.

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Hi @harshbarj

Before doing any stuffs, use memtest to test your memory.

you can also use prime95 to stress and check your computer.

If all is okay, check for any BIOS updates from Lenovo and apply it.

https://pcsupport.lenovo.com/us/en/produ...

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