apple logo flashing on and off on a black screen . iphone 6
hi my screen keeps flashing the apple logo on and off on a black screen
iPhone 6, iOS 12
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Try to stop it performing a forced restart of your model 6:--> Force restart iPhone – Apple Support
If you get no improvements, have your device inspected at an Apple Store or AASP:-> Apple – Location Selector
Regards
Giulio