Nobody can tell if it's either the backlight circuit gone bad on the logic board from liquid damage or the screen gone bad.
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Nobody can tell if it's either the backlight circuit gone bad on the logic board from liquid damage or the screen gone bad unless the device is physically in their hands and they have tried a replacement screen.
My advice is to take it to a mobile phone repair shop and get them to try a replacement screen and see if it works from there.
If not, then time for a replacement phone (unless you find someone that fixes no backlight on it).
Nobody can tell if it's either the backlight circuit gone bad on the logic board from liquid damage or the screen gone bad.
My advice is to take it to a mobile phone repair shop and get them to try a replacement screen and see if it works from there.
If not, then time for a replacement phone.