My android phone(samsung) suddenly had vertical lines on the screen w/ a black bg. What should I do?

[NeedHelpz]

Out of nowhere, my phone had vertical lines on almost all parts of the screen. I’ve seen answers at other similar questions that I should replace the LED screen. (But I’m broke... soooo) is there any other way to fix it w/out involving money? Other than those lines the phone seems to work just fine.