I recently had installed a new ram for my laptop, and it randomly shut down after some time.
My Laptop Asus X550lc
i5-4200u 1.6ghz ~ 2.3ghz
4gb ram (soldered)
Newly installed ram Micron Ddr3l 1.35v 1600mhz.
However i had tried on other laptop, and it doesnt have this issue.