It was in November 2024. My phone got soaked in the sink while I was watching a video recipe tutorial. It was still working when I picked it up, put it in the rice (a belief), and left it for a few hours. When I checked it, it was no longer working – only a black screen. But it does charge.
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@gen4995 Rice does not work. It does absolutely nothing to help you with this repair. All it does is waste time and waste food. Check here https://www.ifixit.com/News/30047/rice-i... for more on this.
For now, you must stop continuing to try to charge, sync or otherwise use your phone. This potentially can make a bad situation worse. This may further damage your phone.
The very first step is to disassemble your phone. Since iFixit does not yet have a guide for that, use the one from here
Since the water damage happened a few month ago, look for major corrosion and evaluate all the pins in the connectors etc. Take a look at all connectors as well as cable ends. For a proper cleaning, use this guide. It was written for an Apple iPhone 3G but it is still pertinent to your phone as well. You will have to remove all the EMI shields from the main circuit board. If you do not remove the shields, you are not cleaning the board. I can not stress the importance of a good cleaning enough, so do it over and over while replacing the alcohol after each cleaning. Isopropyl alcohol in the higher concentration will evaporate quickly and dissipate the water., so there is no reason to have to dry the phone etc. The importance here is the cleaning. It would of course be best to get it professionally cleaned with an ultrasonic cleaner but if you do not have access to one, this will at least help.
Once all of this is done, you also want to go head and replace the daughter board (charging board) as well as the battery. Cellphone batteries do not do well after water immersion and will eventually fail. Since you have the phone open and disassembled, might as well do it now. After that reassemble your phone and reevaluate. Until it is cleaned, everything will only be a guess.
It is possible that you have a bad display assembly. Replacing the display assembly may fix it. Even with all this, water damage has only a small chance to be fully repaired, but at least you can give it a try.
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You might just have a partial short on a PCB that can be removed by cleaning, or something like that might gave damaged an IC or other device requiring replacement of the whole PCB - usually the main board.
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