My old computer that I used all the time just broke

Ugh, this sucks, I used it so much!! Now I have to type everything on my phone… My computer had been working fine these past few days! Even though it was slow, it still worked normally. But today when I tried to use it, the screen just went black, and then a bunch of lines showed up  ,so I turned it off.;-;😭☠️whhyyy