"iPhone 6 rear camera and flash not working"に関する回答If your camera was broken, a new rear camera may fix it. If your camera is not broken it's likely a problem with the power button flex. Another possibility is a logic board or software issue, but I've rarely seen that.
"Error 53 Will new home button fix problem/ dont have original"に関する回答Error 53 has been removed as an obstacle to restore. Touch ID will not work but the device will restore properly now. https://techcrunch.com/2016/02/18/apple-apologizes-and-updates-ios-to-restore-iphones-disabled-by-error-53/