HELP/ My phone suddenly developed yellow lines n I cant tap the screen

Yesterday, my phone had no battery and i didnt charge it, but it was fine the last time i used it. Somehow today in the morning i went to charge my phone and the first thing i see was a screen with yellow lines running across it and at first i could tap, but gradually the phone wasnt picking up my taps and then it completely stopped. So now all i can see is a screen with yellow and white lines running across it and me not being able to tap my phone. I tried restarting it a few times but it didnt work at all. Seems like there is no fix, but can someone enlighten me whats wrong and if there is a chance i can fix this

One more point to note, my phone screen has been cracked for 6/7 months and it has been running fine. Just today, the fateful day..