When we boot iPhone 7 or iPhone 7 Plus,you might see these messages in iTunes.
Try to update your iOS device again.
If your iOS device disconnects during the update or restore or if iTunes couldnt tell the device to restore, you might see these messages:
it stuck on white Apple logo, and then it reboots automatically. Connect it to computer with Apple data cable , and brush it with iTunes, The iPhone could not be restored. An unknown error occurred 4013. This failure is common to the iPhone 6s 6sp 7 7P model.Picture 9-7-1
Brush iPhone with iTunes and then it reports unknown error 4013 common fault is usually caused by baseband CPU an d 19.2 crystal oscillator.
To find out if the baseband caused the problem, you can replace the new iPhone baseband CPU , and the brush it again, see if iTunes will reports unknown error -1. If it does report an unknown error -1, this indicates that the original baseband damage caused that problem.Picture 9-7-2
To determine whether it is a 19.2M problem, you can directly replace the new 19.2 crystal oscillator, and then use iTunes to brush it again. Picture 9-7-3
It is worth noting that the damaged baseband power supply also can cause this fault. In a word, please be patient with the testing process.
Try to update your iOS device again.
If your iOS device disconnects during the update or restore or if iTunes couldnt tell the device to restore, you might see these messages:
it stuck on white Apple logo, and then it reboots automatically. Connect it to computer with Apple data cable , and brush it with iTunes, The iPhone could not be restored. An unknown error occurred 4013. This failure is common to the iPhone 6s 6sp 7 7P model.Picture 9-7-1
Brush iPhone with iTunes and then it reports unknown error 4013 common fault is usually caused by baseband CPU an d 19.2 crystal oscillator.
To find out if the baseband caused the problem, you can replace the new iPhone baseband CPU , and the brush it again, see if iTunes will reports unknown error -1. If it does report an unknown error -1, this indicates that the original baseband damage caused that problem.Picture 9-7-2
To determine whether it is a 19.2M problem, you can directly replace the new 19.2 crystal oscillator, and then use iTunes to brush it again. Picture 9-7-3
It is worth noting that the damaged baseband power supply also can cause this fault. In a word, please be patient with the testing process.
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