Phone shows apple logo but won't turn on after new battery replacement
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?