Black Display
iPhone Xs still making sounds and vibrations but display stays black. Tried to turn off but after a few seconds of holding in the button, the siren starts...
iPhone XS, iOS 13
iPhone Xs still making sounds and vibrations but display stays black. Tried to turn off but after a few seconds of holding in the button, the siren starts...
iPhone XS, iOS 13
I'm guessing that the 'siren' starts because you aren't doing the 'force reset' correctly?
follow this link and see if it helps
If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support
Black Display