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Hi and Welcome. My Name is ***** ***** I look forward to assisting you today with your question. I’m sorry to hear you're having trouble with your phone. I know that can be frustrating. Hopefully, we can get this resolved quickly
The random could have indicated a major hardware failure like the internal board. If the internal board is failed, then most insurance companies won't fix it and they will just replace it as the cost of repair is almost the same of the price of a new one.
The problem is, if the phone is not turning on at all, then there is no way to back up the photos or files now. Your computer won't read the contents on the photo without it being turned on and giving permission on screen (a security feature).
Connect it to your computer for 20 minutes and try to turn it on. Does it turn?
I'm sorry I couldn't give you a better solution. Have a good day!