iPhone 14 black screen

Hey there kikilara,

Thanks for reaching out to the Apple Support Communities.

While we would be unable to say for sure why your iPhone stopped responding unexpectedly, check out the steps listed in the following resource that can help with this issue: If your iPhone won't turn on or is frozen - Apple Support

If your screen is black or frozen

Follow the steps for your device.

On your iPhone 8 or later, including iPhone SE (2nd and 3rd generation)

1. Press and quickly release the volume up button.

2. Press and quickly release the volume down button.

3. Press and hold the side button until you see the Apple logo.

4. If your phone doesn't turn on, follow these steps to check your hardware and charge your phone. You might need to charge for up to an hour.

5. If your phone still doesn't turn on, contact Apple Support.

If you notice that your iPhone stops responding often, you may be able to narrow down or possible identify the cause of the issue using the steps in this next resource here: If your iPhone or iPad is running slow - Apple Support

Let us know if you have any other questions.

Cheers!