I am new at arduino and ı don't know what happened

I ve been working with an arduino uno ad no matter what ı try ı can't download my sketch to the board.I used to download my sketches with no problem few hours ago.It fell to table from 10 cm above the table.
The leds on the board emmitting light.Please help:(
Ps.Sory for mistakes.

Go to "Tools" at the top left of the IDE program (The program you use to make sketches) and select your board type and the port that your arduino is connected to. If your arduino is properly configured, the port will automatically have the name of the arduino next to it

FroggierSnow7:
If your arduino is properly configured, the port will automatically have the name of the arduino next to it

Unless it's a clone Uno with the CH340 USB serial chip, then it will only show the port name and no extra information.