Chosen Solution
Hello. So I went to fix my friends iPhone 6s for what I assumed was just a simple battery problem. His phone randomly stopped working and got stuck on the apple logo, unable to go to the homescreen. Tried a new battery, tried other batteries, same issue. I then took his screen/the new battery and tried on a different iPhone 6s and they both worked perfectly fine. I tried a new screen on his phone, same issue. Tried unplugging all the cables (charging port, home button cable, front facing camera, back camera). Pretty much tried everything I know on how to fix this type of solution and unfortunately had no luck. As a last resort I wanted to come here and see if anyone has any other suggestions for me to attempt. It stays on the apple logo forever before it has a quick flash, then back on the logo. Then eventually the screen just goes black. Appreciate any suggestions and help
Software crash thats why is not loading, try to put it in DFU Mode , if you get it to DFU mode there’s the issue. you can try to update it but it might fail , if you flash it from 3Utools still gonna restore the device