In the fall of 2015, my previous iPhone 4S fell into water and blacked out. Afterwards, like now, when charging, the mainboard will get hot, but nothing will show up on the screen and the battery also have no reaction.
Is it possible to fix it? Do you think it's the screen's problem or the battery? If it's the battery, why would the mainboard heat up?
If it's the screen, does it mean after I get a new screen I could see my past data and information on the iPhone?
Or is it possible to save the RAM/CPU, for use in a functioning phone, for me to see the data?