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原帖由: oldturkey03 ,

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Check your dock connector for any shortening of the pins, i.e. broken or bend pins as well as corrosion. Check and clean the logic board of all corrosion. Check the solder pads for any shortening out of the points. Check for broken traces on your logic board. If none of that worked, I think its time for a new logic board. Good Luck.

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