Broken front camera/proximity sensor/speaker after backlight repair
I was attempting to repair an iPhone 6s screen, carelessly left the battery attached and blew the backlight fuse when connecting the screen. Sent it off for repair and it came back with a broken front camera, proximity sensor and the top speaker. Assuming that the ribbon cable had been damaged, I sent it back to be repaired.
The workshop connected the screen and assembly to another phone and said it worked perfectly. They ran diagnostics and said that it had software problems and needed to be restored.
They sent it back and I restored it and the problems still persist. If the assembly is in working order then is it a problem with the logic board? If so then what could have damaged it?
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