Black boot screen with Tricia tty1

Hi. I installed Linux Mint 19.3 on my Samsung NC10. Everything worked normally, but it is the second time that at startup a black screen appears with the writing "Linux Mint 19.3 Tricia (computer name) tty1", it asks me to log in with the user and password that I enter and a command line appears with username @ computer name: ~ @ and I can't do anything anymore.
Even if I reboot it always returns to the same screen. It had happened to me once again but I had solved it by formatting since I had not yet transferred all the data to the computer.
I tried searching on Google but found no solutions to the problem.
Could any of you help me, please?
Thank you in advance