I have a Lenovo B50 Laptop but I can't use it because when I'm using it, it shuts down randomly. I thought it was a battery problem and I've changed it but it didn't work.
I've tried to install Lubuntu on it thinking that it was a Windows problem, but nothing. While I'm using it (Internet, Libreoffice, etc.) it shuts down randomly.
What else can I do? There is any tool that I can use to search the problem?