only logo for apple

See the last section of:

If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support

This will take you through the steps of using a special recovery mode in the phone to reinstall IOS with the help of iTunes on a PC or Mac.

Hi

Turn iPhone off Make sure your pc is running the latest iTunes 12.7

Connect lead to USB on your pc

Press &hold just the power button down on iPhone don't let go Connect lead to iPhone keep power button pressed down until pc sees iPhone Then wait for restore you may need to do this more than once Before it works.

Cheers

Brian 🇬-1F1E7;