Original post by: Minho ,
Sometimes poor quality chargers and cables can cause charge circuit damage on the logic board (Tristar IC) but I’ve never heard of this causing searching issues. Does everything else work on the phone, like cameras, sensors, WiFi/BT, buttons etc.? At this pont, you may want to do a backup and then Restore the device to see if that helps. Beyond that, you’ll probably have to have this phone looked at by a shop that does micro-soldering repairs.