how do i restore my iphone when it keeps going on and off to the apple sign
my phone was working fine, and all of a sudden it just went black and the apple sign keeps coming on and off the screen.
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Try a Forced Restart on the phone. Follow the instructions very carefully, as this is a bit tricky. You may need to repeat this several times.
Force restart iPhone - Apple Support
There are only 2 possible results when you perform a Forced Restart:
1) The phone returns to normal operation......or......
2) There is a hardware problem with the phone that will need attention at the Apple Store (make an appointment) or at an authorized Apple Service shop. You can find a listing of authorized service shops in your area by using the link below: