Stuck in DFU mode
son dropped his iPhone 6s, cracking the screen protector, and the screen. I just replaced the screen using the ifixit complete kit, and the original home button. Could not get the phone to power up. Downloaded newest iTunes and connected phone. iTunes believes phone is in DFU mode. Attempting to restore generates error 9. I have switched cables, and even using the Apple cable generates the same error.
During restore attempt, apple logo and progress bar appear on phone screen.
Holding power and home button then releasing and pressing power button does nothing.
Any help appreciated.