Do not Unplug the device until the phone is fully booted. This will take longer than normal, as it will require an initial setup. do not get scared if it takes long. it can take upto 10 minutes depending on the device.

Do not unplug or power down the device during this procedure. Interrupting the repair half way, or using the wrong files can cause the device to become BRICKED, which is a completely different repair.