Water damage on smartphone causes super dim screen?

I dropped my Samsung Exhibit directly into a cup of water, and immediately removed the battery and put it in a bag of rice overnight, it still works but the screen is super dim, and adjusting the brightness does nothing. I can only see what i'm doing in a very dark room

The backlight either failed or it needs more time to dry out… When I repaired a water damaged iPhone 5 it had lots of water damage on the lcd after using it and letting it dry out there are only a few marks on it… But this seems like the backlight has failed