Chosen Solution
So i recently updated my phone to ios11. Day or two after, my phone shut off then “turned on” by itself. Shows the logo , then goes off. Repetitively. Thought it was my battery so i got a new one and day after still doing same thing. I was able to get it into recovery mode but it did the same thing. Please. Help.
See if this works, if you’ve done this just advise. While the usb cable is connected to the computer, hold the home button on the iphone and connect it to the lightning cable. This should trigger the Itunes download mode. This will also cause the device to restore, so you will lose everything in the unit. Good luck