black screen iphone xs powers on rings but black screen

Try a forced restart of your XS, using these instructions:--> Force restart iPhone – Apple Support

If the issue still persists, it might be a screen failure. Have your device inspected at an Apple Store or AASP.

Regards

Giulio

No idea about that, since we can't diagnose that kind of issue remotely, sorry.

You can try and contact Apple support online (they have tools to run remote diagnostics):--> Get Support

Regards

Giulio

My pleasure. Have a great day as well.

Giulio