Black screen but everything else is working fine.

Its been a while since i broke my phone but now im on a search to either fix it or replace it. Anyways the story is this. I dropped my phone and when i picked it up the screen was just black. turned it off then back on and came to a conclusion that the touch screen sound vibration and everything works on the phone but the screen is just blacked out. when i turn it on it goes green sometimes for a quick second but back to pure black. is there anyway i can fix this or should i cut my losses and just buy an old used phone? please help thank you :)