Very dark display. Hard to see anything.

Hi,

unfortunatly water got to my phone. It started to flash so I turned it off… After couple hours I turned it on and it was still flashing, and on the lock screen it stopped and down left part of display was darker. So I turned it off again and disassemble phone at home to make it dry more. After that I turned phone on , but the display is dark (but something is possible to see ). We think it’s a backlight. How do you think, is it possible to fix it without replacing the display ?