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Error 51 iPhone 7 after restoring

Good day,

A customer of mine had his phone updating however he unplugged the phone accidentally while it was being updated. Now, when i put the phone in dfu mode and restore. Its giving me an error 51. I am aware that this is a board related issue. However, can anyone advise if they experienced this issue so that I can know weather it is the NAND or BBCPU or whichever may be the issue.

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Try restoring the phone using 3Utools. Hopefully that works.

If not then I'm sorry to say it's probably the NAND needing to be reprogrammed.

Try getting it restored at an apple store as it could be your computer having issues communicating with the phone properly with iTunes etc.

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it sounds like the IPSW file format is corrupted. the customer might have run a beta or jailbroken version of iOS which can usually be 1 of many reason for error 51

delete the existing saved IPSW in the iTunes directory

for Mac

  1. Launch Finder
  2. Click Go from the menu bar
  3. Scroll down and click ‘Go to Folder’
  4. Type in “~/Library” and click Go
  5. Click and open the iTunes folder
  6. Open the iPhone Software update
  7. Delete the.IPSW files

for Windows

  1. Go to C:\Users\Your Computer Name\AppData\Roaming\iTunes\iPhone Software Update
  2. Find the.IPSW file and delete or you can press CTRL +A (control all) and hit the delete on your keyboard.
  3. Update the iPhone again.
  4. trying an update after this procedure should force iTunes to download a new file format


try downloading a fresh IPSW image currently Apple only sign 11.4.1 and Proceed to update the iPhone

hope this works if that doesn’t work. you might wanna give FoneDog toolkit IOS system recovery a try

cheers

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MICHAEL JABARI NELSON 가/이 대단히 고마워 할 것입니다.
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