Chosen Solution
Hi, so I have an iPhone which has been dropped into water. It was’t working at all, so I fixed it by cleaning motherboard with isopropyl and changing battery with new one (as the old was dead). When the battery came, I just briefly connected all things together so I can see if it will boot up. It did. I was happy, so I just assembled it all (didn’t put display back into chasis yet) and tried to boot it up now. I was really surprised when I found out that the iPhone was in infinite bootloop (apple logo for 5 sec, black screen for 5 sec, repeat). I read on the internet there are way many things that can be wrong at this point, but if it was working disassembled just connected together, why is it not working now? I checked all connectors, cleaned it all with air, checked for any weird things with lens, but couldn’t notice anything. I will try to get you a photo, but for now, can I ask if this is familiar to you in any way and do you have any suggestions on what I can try next? I am really dissapointed it didn’t work.
First,water damage is unreliable. Cleaning the board definitely can help,but if component damage happened,what’s done is done. You’d have to have the component replaced. Sometimes an ic chip can get water underneath it and corrode the solder balls. The metal plates that are soldered to the board that cover the cpu and chips could have water under them. If they got corrosion,you can’t really clean it very well unless you remove the shields,which requires a soldering skill. I assume you took the whole logic board out to clean? If so,are you positive you put the screws back into the correct holes? Long screw damage is a thing. Now if it’s not water damage causing the reboot,I’d say did you connect or disconnect the screen before disconnecting the battery first? Did you possibly knock any components off? If you mixed up your screws and put one in the little metal ring nut(like the ones directly attached to the board for the lcd plate screws),it could have been a long one into a smaller hole and dug into the board. Did you try disconnecting the camera flex cable to see if it did the same thing?
