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iPhone 6- Error 9 in iTunes Recovery: Original USB Cable, Latest iTunes, Reboots, Progress Bar

chrisbp 10314 12
Best answers

Why does an iPhone 6 show error 9 during restore in iTunes, reboot after the progress bar, and how can it be fixed?

Error 9 in this iPhone 6 restore is most likely a hardware fault, usually in the NAND, EEPROM, CPU, or the CPU-EEPROM connection rather than in iTunes or the USB cable. One suggested fix is to replace the U0301 ONSEMI EEPROM and then do a DFU restore [#16502989] Another reply says about 80% of these cases are damaged NAND, about 10% are EEPROM, and the rest are problems with the EEPROM connection [#16516431] However, others note that many “NAND” error 9 cases are actually caused by the CPU, and after NAND reprogramming/reballing the fault can still remain in the CPU, RAM, or CPU-EEPROM path [#16515605][#16521815]
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  • #1 16501108
    chrisbp
    Level 9  
    Posts: 717
    Rate: 48
    iPhone 6, original USB cable, latest iTunes. When you try to recover (hangs on the iTunes logo with the cable) a progress bar appears, the phone reboots and an error pops up 9. I've sold the disk and it's still the same. I missed ideas ...
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  • #2 16501880
    gsmowiec
    User under supervision  
    Posts: 552
    Help: 27
    Rate: 128
    After reballing the nand, the progress bar on the screen still appears and the error is black screen and the phone is immediately detectable in DFU?
    For the tristar substitution
    to reprogram / substitute nand
    it can also be a CPU problem.
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  • #3 16502098
    chrisbp
    Level 9  
    Posts: 717
    Rate: 48
    Progress bar and error. There is also a bootloop.

    EDIT - What does tristar have to do with it? Does not accidentally manage energy?
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  • #4 16502989
    conrad9210
    Level 26  
    Posts: 909
    Help: 83
    Rate: 210
    Hi, replace / shed U0301 ONSEMI EEPROM, after replacing the necessary soft with DFU.
    greetings
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  • #6 16515029
    chrisbp
    Level 9  
    Posts: 717
    Rate: 48
    conrad9210 wrote:
    Hi, replace / shed U0301 ONSEMI EEPROM, after replacing the necessary soft with DFU.
    greetings

    I am waiting for the part, ordered. Very small is ... How far does a colleague bet that it is?
  • #7 16515605
    gsmowiec
    User under supervision  
    Posts: 552
    Help: 27
    Rate: 128
    I bet on cpu for 90%.
    Most of this type of error, which supposedly suggests damage to nandu, comes from the cpu.
    Anyway, you could simply eeprom solder or check resistances and not immediately issue 10E.
    Sam, I have a play somewhere in which I have crossed out and then exchanged eprom, tristar and a new programmed nand, and the album still falls into error 9.
    So a little bit different from the subject - can someone to prock a Prock?



  • #8 16515805
    chrisbp
    Level 9  
    Posts: 717
    Rate: 48
    gsmowiec wrote:
    I bet on cpu for 90%.
    Most of this type of error, which supposedly suggests damage to nandu, comes from the cpu.
    Anyway, you could simply eeprom solder or check resistances and not immediately issue 10E.
    Sam, I have a play somewhere in which I have crossed out and then exchanged eprom, tristar and a new programmed nand, and the album still falls into error 9.
    So a little bit different from the subject - can someone to prock a Prock?

    Without the microscope unrealistic
  • #9 16516431
    gazownik10
    Level 16  
    Posts: 185
    Help: 9
    Rate: 24
    Hello! 80% of cases are damaged nand ... 10% epprom and the rest is not connecting to eprom. But all these defects can be repaired. The last option requires a lot of time and skills but can be repaired without any problem. I am in possession of a similar cnc machine but in this case it is not needed for anything :D
  • #10 16516508
    chrisbp
    Level 9  
    Posts: 717
    Rate: 48
    gazownik10 wrote:
    ... but in this case it is not needed for anything :D

    Can you ask for something more clearly?
  • #11 16519625
    gazownik10
    Level 16  
    Posts: 185
    Help: 9
    Rate: 24
    cnc does not give anything in this case :D cpu must be removed without damaging it :D
  • #12 16521428
    gsmowiec
    User under supervision  
    Posts: 552
    Help: 27
    Rate: 128
    gazownik10 wrote:
    cpu must be removed without damaging it :D


    I would like to clean up and incriminate myself, and the latter is impossible at least for me.
    CNC is useful for iphone as well as this crappy programmer - once in a thousand times.
    Fortunately, I managed to sell it :D
  • #13 16521815
    RafalB

    Level 28  
    Posts: 1110
    Help: 91
    Rate: 222
    Nand falls 1 in 10, and in the case of errors after reprogramming and reball CPU or RAM CPU or playback of the CPU-eeprom connection remains.

    iPhone 6- Error 9 in iTunes Recovery: Original USB Cable, Latest iTunes, Reboots, Progress Bar
    Company Account:
    iFixThis
    Łowmiańskiego 18, Poznań, 60-685 | Tel.: 516XXXXXX (Show) | Company Website: https://www.instagram.com/ifixthis.pl/
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Topic summary

✨ The discussion revolves around an iPhone 6 experiencing Error 9 during recovery via iTunes, despite using an original USB cable and the latest iTunes version. Users suggest that the issue may stem from hardware problems, particularly with the NAND chip, CPU, or EEPROM. Solutions proposed include reballing the NAND, replacing the U0301 ONSEMI EEPROM, and checking connections. The consensus indicates that most Error 9 cases are linked to NAND damage, with some users emphasizing the importance of careful handling of the CPU to avoid further complications. The conversation also touches on the challenges of repairing these components without specialized equipment.
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