Random Lenovo power failure

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Nov 2, 2018
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Laptop: Lenovo IdeaPad Z510
Owned for ~5 years

My laptop will randomly turn off immediately, with no warning. Once off, it will keep trying to turn on - the screen turns on and hard drive will make the usual clunking noise, but it rarely works for more than a few seconds.

I have taken the battery out because it was dead anyway and to make sure it wasn't the source.

About two years ago, I noticed that sometimes pressure on the area where the hard drive is could cause a similar shutdown. Recently, a similar effect happens and appears to be triggered by something as light as a headphone wire - but only sometimes.
 
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