Share easy solutions to iPhone 7 won't turn on with you.
1. Charge the iPhone 7;
2. Check for physical damage. If any physical damage, take your iPhone to the Apple store for repair;
3. Press and Power and Volume Down buttons at the same time to force restart the iPhone 7;
4. Use an
Apple iPhone system recovery for Mac [joyoshare.com] or Windows. It can help you with the issue without data missed;
5. Manually put the iPhone into recovery mode or use Joyoshare UltFix (can let any iDevice enter/exit recovery mode with one click without payment) to get your iPhone 7 into recovery mode. Then connect the iPhone to iTunes to restore it.