Chosen Solution
I replaced my iPhone 6 battery and managed to put everything back together. However, when I tried to charge the phone, the white/black apple screen comes on but then blinks off. It stays on for about 8 seconds and then goes off for 5 seconds and then on again - on and off. Any ideas what I did wrong?
Check again battery cable is properly connected, as it behaves as if there was no battery at all. It might be a faulty battery too..maybe try your old one for confirmation.
