Chosen Solution
So I just now dropped my iPhone and it wouldn’t turn on so I I plugged it up to the charger thinking it was dead but nothing so I opened it up to see what was wrong and the screw that holds the battery cover on came out and the batter was unplugged and the screw was at the top of the phone under the camera and it was magnetic to the little plate to the behind the camera so I moved the screw and plugged the batter up and it would just show the apple logo repeatedly so I unplugged the battery and then unplugged the lcd and the cameras and the rest of the little plates and plugged it back up but still it does the same thing Update (07/20/2018) It also had a battery replacement a couple of months ago
it looks like your software has crashed when the battery disconnected. you may have to connect it to itunes and try to update the software and it does not update successfully you may have to restore the whole software. but before taking drastic measures try to use a charged battery and also disconnect the front camera and back camera flex it may be faulty after the drop.
Does apple logo appear while unplugged or only while plugged into a charger?
