Xperia X10i HELP !!!!!!!!!!?

my Xperia X10i fell in water,my bad but i got it repaired and all and it works fine but once it turns off it just doesn't start up again i mean, i could feel the vibration but then nothing happens i could charge it when its off and sometimes (1/6) times it works out and it goes to charging screen from where it starts up but usually nothing happens. Any suggesstions?