I have a samsung S4 SCH 1545. I need help to determin which componet is bad.

[AC Question]

It got completely submerged in water. The screen was still lit up and it was still Bluetooth playing music when I got the battery out. I completely dissembled it down to the screen . Thoroughly dried it, brushed all the contacts I could find. When it powers on, it vibrates like it should, makes all the sounds it should. the tiny green power light comes on momentarily like it should. Does all the dinging like it is receiving messages or emails. The problem starts here, no screen, its black. The buttons or touching the screen has no effect, no sound like it would make if you were affecting it. Could this only be a screen problem or a mother board / screen problem?

 

[B. Diddy]

Welcome to Android Central! It sounds like primarily a screen problem, but it can be so hard to tell, since immersion in water could lead to damage of multiple components. For example, you might later find that the camera doesn't work either. Best thing is probably to bring it to a repair shop.