원문 게시자: gillrios ,
What you're describing is a U2 (Tristar) chip issue. If you replaced the charging port and put in a good battery and the phone doesn't turn on or charge then the U2 chip needs to be replaced which is underneath the shielding were it gets very hot that you mentioned in your picture. It requires a skilled person that knows microsoldering to replace the chip. I hope this helps you answer your question.