... off the other day as it was playing up saying I had no photos and videos on my camera roll, the wifi was playing up and I had no storage so when I tried to turn it back on later that day it went from the normal black screen to the white screen with the apple logo as it would usually do then maybe a minute or maybe less after it went back to the black screen and it would repeat this every time I tried to turn it on, I've tried charging it and doing the thing where you hold the home and sleep button and the volume and sleep button but neither of these methods worked please help me