Chosen Solution
I bought a new battery from ifixit a month ago because my old battery wasn’t holding a charge very long. I didn’t have time to change it until this week and when I switched the batteries my phone won’t turn on. While the phone is plugged in I get the apple logo for a few seconds and then it turns off. I have left it charging for hours and still nothing happens. I also switched the batteries back and my phone works fine with the old battery but still doesn’t hold a charge for very long. I have double checked all the hook-ups etc and I did order a 3G battery replacement for my 3G iPhone, is the new battery I have just bad or could it be something else?
try updating in itunes.. if you get an error message, click on details and it should give you an error no. get back to us with which one it is. Sandy.. hold home button and then plug in to itunes and update/restore if that doesn’t work try iReb, recboot or try downloading tinyumbrella - it can save your apple updates, and boot out of recovery loop/put in DFU
I had the same problem. Luckily I ordered batteries for both mine and my wife’s phone. The first try didn’t work so I tried the other battery and it worked fine. When I was pulling out the battery from the first try I noticed the “tape” part that goes from the battery to the connector was torn. That was the problem!
I’ve had the same problem today. If you replaced the battery yourself then patiently remove the screen again and check that ALL the plugs are FULLY inserted. I would’ve saved myself about an hour of googling if I had done just this.
