Thank you for the answer. The notebook have a Celeron, 2GB of DDR3 RAM, 320GB of HDD, and have about 10 years. It wasn't dropped or bumped, but I has changed from Windows 7 Home Premium to Ubuntu 17.10. How can I boot it into safe mode ? I have open the notebook and the connections aren't loose. Also I tried to fix it with my parent, but we didn't succeed.
Sorry for my english, I'm not a native english speaker. 😉