after replacing battery, will not charge,turns on only when connected

After replacing the battery the phone only comes on when connected to wall charger. Battery % at 48% does not change and lightning bolt is on.As soon as taken off the wall charger the phone turns off. Will not charge with usb cable on computer.Can not make or receive calls,no sound.Did Try holding the power and home button until apple logo but no change.Does this sound like the dock connecter/charging port needs to be replaced or could I have done something else wrong when replacing battery?