Hard reset, etc., does nothing for a friend's iPhone and if she connects her cell phone to her Windows laptop, the device is not recognized. It always hangs between the Apple logo screen and the battery charge screen
Then there's an error that needs to be repaired.
What did Apple Support say about it? Or Apple at the Genius Bar?
Call Apple Support or go to the Apple store or go to gravis.
Try this: press the on / off switch for approx. 10 seconds and at the same time press the volume up and then volume down…
Thanks, but that's called hard reset and that doesn't work…