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The maintenance of iPhone startup constant current and current jump faults

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In this lesson, we mainly explain how to check the error codes of flashing machine

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First of all, when we flash the phone, we will choose different software,

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we may use iTunes, or Aisi assistant

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The error codes of these two softwares are different, how can we check them?

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Let's first look at the iTunes

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We need to check the progress bar of the flashing machine

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Because of the error codes that appear in different progress when flashing the machine,

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the maintenance methods are different

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For example, error 9 is reported at the third waiting point when flashing,

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and error 9 is also reported when the software is being restored

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When it comes to restoring the firmware, or verifying the restoration,

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error 9 is also reported

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At this time, we want to determine which component caused the flashing error

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We need to check the maintenance direction according to the progress and error codes

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Let's take a look at the process of iTunes flashing

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When the phone enters the recovery mode,

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first connect to the computer,

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and we open the flashing software on the computer

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The computer will automatically recognize that the phone has entered the flashing mode,

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and will prompt you to update or restore

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At this time,

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we click cancel, hold down the shift key,

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and then click restore

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At this time, we can choose the system we downloaded

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After selecting the corresponding system,

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we choose to open and restore the iPhone to the latest system

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And it will clear all the data in the iPhone

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If the customer's iPhone information is important, we don't flash

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Because if you flash the phone, there will be no data in the phone

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Then we choose to restore,

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after choosing to restore, we focus on the progress bar when flashing

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Now the software is being extracted

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After the extraction is complete, the iPhone has been restored from the backup

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At this time we can see that the screen will turn black

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After the phone restarts, the Apple LOGO icon appears

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Now waiting for iPhone

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While the iPhone is waiting, a progress bar will appear on the phone

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It is now verifying the recovery

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At this time, it is connected to Apple's server to verify that there is no problem with the system firmware

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restoring software

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The computer will rewrite the new system to the hard disk

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If the progress bar has passed, it turns black

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At this time, the data in the iPhone is gone

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Verifying recovery software

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The progress bar on the screen will go about halfway

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Validating software

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If an error is reported at this time, it is generally a problem with the network of the computer,

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or there is a problem with the bottom layer of the hard disk

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Restoring firmware

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Flashing to the baseband circuit

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If an error is reported at this time,

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it is generally a problem with the baseband or NFC

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verifying recovery

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When the firmware is verified and restored, the entry bar has reached about 80%

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At this time, the flashing is finished

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The screen of the mobile phone will be black, and it will be turned on again,

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and the progress bar will go through again

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It will take a long time, about 5 minutes

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If the mobile phone is powered by an adjustable power supply,

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it may restart if the progress bar is not finished

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When the progress bar reaches about 60%,

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the phone can be recognized on the computer

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If the iPhone has an ID account number and password,

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then we need to enter the ID account number and password to activate

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If the ID account password of the iPhone is forgotten, the machine cannot be used

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Ok, that's it for this lesson