How to fix iTunes error 9 in an Apple iPhone 6s

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How to fix iTunes error 9 in an Apple iPhone 6s: crwdns2935265:00crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

Re-solder a new tristar chip onto the logic board.
Apply a small amount of isopropyl alcohol to the areas where flux was applied.
The isopropyl alcohol will clean any remaining flux that was not burned off during the heating process.

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