Check you just haven’t blown the backlight. Shine a torch on the screen and see if you have an image. I have found if you remove the SSD and shine a torch at the back through the apple logo is best as this is where the flashing folder will appear. If you can see an image this would mean a component on the backlight circuit has become faulty.
Depending on your skills and equipment and what component has become damaged will determine if you need to send it to a repair shop.