dropped my laptop

Are you saying that some etxt display is present when the corner is present as if it was working as it should? Or is this you get something to display besides the green line, etc.. basically, most laptops can be repaired for some costs, but cheap is aren't a good word to use when a tech has to do this. But, you gave no clue as to what the laptop is as some models are easier to repair and a user could do this provided you have some skills and capable to even try. I leave that up to you. Check online or call numbers you find to get an idea what costs maybe, but add to that any S/H as added cost as well.

tada -----Willy

Connect the laptop to an external monitor and see if it outputs to that screen normally. You may need to press some keys to do this but I can't tell you which ones. You'd need the instruction manual. If your laptop outputs to the screen, the display is bad. It has two main components if the older cold fluorescent tube type. One is the high voltage card (sometimes called an inverter) and the other is the screen which includes the backlight. These are replaceable by persons with the proper skills. If you want to try this yourself, you'd need to know the proper part number of the screen in your laptop. You can usually find used screens on laptop repair web sites. If you have the work done by a shop, expect to pay at least 3 to 4x the cost of a used screen. You now get into the decision process as to whether or not repair is economical or worth while.

But a tech would use that clue to try to see if the unit can be saved. It appears you don't do this repair work so my advice is to get your files safe before you ask for repair quotes.
Bob

It seems that your display panel has some internal issue, better if you could take it for service but don't forget to backup your important data.