boot – Ubuntu 18.04 give black prompt not start

I am using Ubuntu 18.04
My laptop configuration are
HP 250 G7
Core i3 Intel 7th gen
4 GB RAM
1 TB HDD

Problem
Today I am starting my laptop with Ubuntu 18.04 LTS, it give black prompt screen with text in image given below.
Please help me, I don’t want to lose my data.

(1): https://i.stack.imgur.com/dVTr6.jpg!(enter image description here)(https://i.stack.imgur.com/0Lwh5.jpg)