원문 게시자: thelectronicnub ,
Put it in update mode. Here's how to do it. First,press the power and home button simultaneously. Then after about 7 seconds release the power button. It should say connect to iTunes. Then plug it into your computer and restore it. It will delete everything on the phone and put the most recent version of iOS on it. If that doesn't work try examing the connector and see if it's plugged in.