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iphone 3GS need help

lizarnator

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my iphone 3gs has been water damaged and i hope to fix it, it has the following issues:
  • recovery loop (when i restore it restarts in recovery mode)
  • *if i pull the usb cable out when it is on the apple logo during restart, it starts up normally*
  • backlight does not work (i have ordered the new coil and will replace it when it arrives)
  • when i do manage to start it up normally, i am returned to the main screen when opening any apps, or safari, or mail etc. also, when i swipe to the search screen (furthest screen left) the keyboard opens and causes the iphone to freeze. this also happens when i try to type a message in messaging.
  • none of the buttons work. i can not enter DFU mode. (tried new logic board in the iphone and the buttons worked fine)
is there a fuse or something on the logic board i need to replace? i'm happy to solder anything i need to, i have a multimeter etc.
thanks for any help.
cheers
 

Skull One

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You still have moisture in the device or worse you have oxidized some of the connectors by using the phone while it still had trapped moisture.

I would recommend turning it off, drying it out properly and hope you haven't created any permanent damage. If you still have problems after a proper drying, I suggest using an alcohol based cleaning solution and clean every connector to remove any oxidation.
 
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lizarnator

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got the logic board sitting in a bag of rice now, will methylated spirits be ok for cleaning connectors?
 

Skull One

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Yeah. I doubt you created any oxides it can't clean up.
 
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lizarnator

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hey, i gave it a good clean with meths and a toothbrush and saw that the reason for the backlight not working is that the connector is really rusty, but its still stuck in a recovery loop. any suggestions? cheers
 

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