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iPhone xs Max brush can not activate repair
Machine model:iPhone xs Max
Failure: Expansion failed, but Update System could not be activated.
iPhone xs Max brush can not activate repair figure 1.
Maintenance process: the customer of this machine can’t get through the expansion of Update System card until 60, and reports an error. It is suspected that Open is engaged in the middle level. After Reballing middle level,Update System can get through, but it can’t be activated.Update System can’t be identified, and Baseband is not available.
iPhone xs Max brush can not activate repair figure 2.
It was found that the motherboard welding was a bit pried apart.
iPhone xs Max brush can not activate repair figure 3.
separate plaorm is directly used.
iPhone xs Max brush can not activate repair figure 4.
REBALLING after separate.
iPhone xs Max brush can not activate repair figure 5.
After resetting welding, the fault was eliminated, and the repair was finished.
iPhone xs Max brush can not activate repair figure 6.
