Display doesn't work anymore

I dropped my phone and it fell onto the protective cover so my display now isn’t cracked but it still doesn’t work anymore. There’s a slim lit up line at the bottom when I try to activate it but the rest of the display stays black. Any suggestions on what is broken and how to fix it?

Update: The whole phone seems to not work properly anymore. My computer doesn't recognize a device and it's offline and won't connect to whatsapp-web for example...