Black Screen But External Monitor Working

On Monday, the bus conductor accidentally dropped my bag from about a 5-foot height. He was supposed to hand it to me, but instead, he let it fall. Now, two days later, my laptop was working fine at school, but suddenly it won’t display anything on its own. However, when I connect it to an external monitor, it works perfectly.

I updated from Windows 10 to Windows 11 a while back and have already reseated the LCD flex cable, as well as the RAM and SSD, but nothing has helped. I even tried installing Fedora 41, but I’m still not getting a display.

I currently have no money to get it checked and really need the laptop for programming. Can anyone help me troubleshoot this issue?

Laptop Model: Acer Nitro 5 AN515-42