Keypad Lights are working.
According to my knowledge lcd is damaged by water.
But unfortunately replacing lcd is near impossible task ,if you are noob at hardware.
Once i replaced nokia 6303's lcd ,that was easy,, but I wasn't able to remove x6's lcd .
You need to go to some repair shop.
If you want to take my advice,don't go to nokia care.
Go to some local repair shop.
(my experience was too bad at nokia care)