Displays apple logo then cuts off after battery replacement
Hi, hoping an iPhone repair guru can help me out. I have done several screens and a couple of batteries but never seen this before.
I recently replaced an iPhone 5S battery. Removed the pentalope screws. Opened up the screen. Disconnected the home button to find there was no metal cover (someone has been in here before). I removed the battery connector and the one next to it which I think is charging port. Metal cover for battery connectors were also missing here so I did prise a bit at the metal bit of the logic board next to them with no success before I realised this. I removed screen connection cover and disconnected screen. After a bit of prising I got the battery out and I did smell the battery acid so probably pierced it. I then put in the new battery connected it and put it back together. I tried powering on but only the battery symbol came up saying to charge. Tried charging for hours with no joy so assumed battery was faulty. I then ordered another battery and fitted it. Powered on the phone and it booted right up to lock screen whilst plugged into charger but started making a ticking noise. I noticed the charging symbol wasn't there so still not charging. I powered off immediately to ensure no further damage was done. I checked the battery connections and powered back on but now gets to the Apple logo for 1 second and screen goes black, no vibration occurs when I flick the silent switch. It then won't power on again for a while unless I press and hold power and home and the Apple logo will display for 3 seconds then goes black again. I tried the other battery in again but shows no power and doesn't attempt to boot. I have also tried without the charger port connected as well but doesn't help.
I'm not sure what the ticking noise was and I don't know if the logic board is damaged of how this could have happened. Maybe the battery blew something. Any help would be appreciated as I now have to give the owner of the phone £150 to cover his loss and I now have a dud phone.
Is this a good question?