原帖由： Minho ,
The fact that the phone is not recognized by iTunes leads me to believe that the Tristar IC is damaged. It is responsible for communicating with peripherals and coordinating the charge. This IC can be damaged by poor quality chargers. I would check the battery first with a known-good battery, as that is the easiest thing to do. However, if that doesn't solve your problem, you will have to take your phone to a repair shop that does micro-soldering repairs to check the Tristar circuit.