The area circled are the antennas for the wifi, so it wouldn't affect the screen. Your device has no backlight, very unlikely to be an issue with the LCD, I recommend the steps below.
1. Remove and clean the logic board using isopropyl, if any liquid damage is present. Check under the board, especially by the top edge.
2. With the battery disconnected, remove the cable I have pointed out in your image. Check the connector it plugs into for corrosion or burnt pins, and the cable itself (underside of cable as well) for corrosion/burnt pins/melted plastic around the pins. Don't plug the cable back in if damaged, will need replacing. If the connector is burnt, a new one will need soldering.
3. Check the backlight fuse for continuity, if it has blown, it will need replacing, and is again soldered (has a little white dot on it, near the LCD connector, if you send a clearer picture of the board I can point this out).
If you are lucky it will just be the backlight fuse, and a new one can easily be soldered. If none of the above works, check the backlight IC to make sure it is not shorted to ground, and blowing the fuse. If you are not comfortable doing this yourself, take it to someone with experience in diagnosing logic boards.