Hi, I hope everyone is enjoying the weekend. I recently bought an Iphone 3GS. The backlight is no longer working at all; however, everything else seems to work. I am suspecting water damage although I never dropped in water. Can you tell me the attached photos show any sign of water damage? My eyes are not very good and I have never seen an exposed water sensor before... Although internet has some pictures, but not very clear. In addition, how does Genius Bar determine water damage besides the water sensor on dataport and headphone jack? Furthermore, if it is water damaged, is it true with $200 dollars they would replace your phone? Thank you in advance.