I dropped my S3 in the toilet. I tried the rice trick; it did not work. I took it apart and tried to clean out any water corrosion. After i did that, it worked... but there was a slight purple screen discoloration. I sent it into Samsung and they ruled that it was beyond repair because of a pad that had lifted on the IF connector. When they sent it back, the screen no longer worked. It charges fine and turns on. I can hear the unlock screen when I touch it, but the screen is completely black. What can I do to fix this, if possible?