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원문 게시자: Reece ,

본문:

This model will boot when the charger is plugged in, if you are getting no fan spin but the S0 rails are present, check ALL_SYS_PWRGD to see if this is present (and the signals U1950 produces for the PCH). Plug the charger in with literally nothing except the I/O board plugged in.

If the CPU is not getting hot, it is likely this signal or another signal for the CPU is missing, check out U7200 too. Likely has been messed with before, so check for any clues on the board indicating past water damage (brown probe points, flux residue, etc).

I won't repeat everything mentioned in the other answers, pretty much covers it and you have got the basics down from doing iPhone board repair. Good luck :)

현황:

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