Chosen Solution
Why is my iPhone 7 hot, has a black screen and is unresponsive.
If your phone is not booting and getting hot it would point to a short on one of the power rails. It would help if you explained how it came to be like this. · Was it on the charger at the time? · Did it happen after a drop? · Was it in the middle of an update? · Did it sustain liquid damage? Unless you have the knowledge and equipment it would be best to have it looked at by a professional.
