Chosen Solution
I took my iPhone 7 to the Apple Genius Bar where they pronounced it dead and were unable to tell me why. The iPhone was being used to play music via the lightning connector into my car’s auxiliary outlet, went into the store, when I tried to connect again, it did not recognize the cable but instead played the music on the speakers. That night, when I tried to charge it, it still didn’t respond to being plugged in. I have tried several Apple lightning cables, several outlets, and of course tried to connect to my iMac to back up on iTunes - however, it was too late and the charge it had ran out. I am desperate for photos on it. This is when I went to the Apple store but they said I’d need to get in contact with engineers to find out what was wrong and go to a third-party for data recovery. Is there really nothing I can do or replace to get it on long enough for iTunes to recognize the device and back up the data?
I am terribly sorry to hear your phone has died. The only thing that may help in the future is to make sure you use genuine charge cables and accessories. I’ve seen many charge ports and charge circuits completely fried on phones like this and it typically traces back to an off brand charge cable or water damage. And try to keep your photos backed up in two to three places at all times. Photos can be absolutely invaluable and irreplaceable. Either way, there is an option to recover your data. I believe it is around $300 for data recovery at ipadrehab.com but it may be worth it to you to get the photos back. And it may be possible to have a working phone as well. I should warn you to not tamper with the phone or have someone else try either because the repair shops discourage this and occasionally will not even attempt to fix your phone. Here is the detail list with general pricing: https://www.ipadrehab.com/article.cfm?Ar…
If your phone did not experience water damage a good repairer will be able to repair your charging circuit. If you send it in for data recovery it will cost around $300 and it might not end up a phone again. Send or take it for repair. It will cost half as much and you will have a working phone again. There is a good chance if you can obtain an iPhone 7 charged battery you will be able to back up your data to iCloud.