dropped in bath, how to fix?

i dropped my n8 in the bath a while ago, i tried drying it out but it seemed completely dead so i left it for a few months, then i tried charging it and turning it on so i could attempt connecting it to my computer to rescue some important pics, and success it worked! but the screen wouldn't light up, would this mean that if i replace the screen it should work, and can i do this myself or do i take it to a chinese man to fix but would it cost many pounds. any advice appreciated thanks.