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Aporte original por: bababooey ,


Just attended a repair course for the iPhone.  The ultrasonic method DOES work, I've seen it first hand.  Make sure you use distilledH20 and a couple drops of dawn detergent.  Place it (the motherboard) in and let it cycle for 15 minutes.  Then take it out and gently scrub it with a soft bristled toothbrush.  Repeat this process twice more then place it under an ordinary desk lamp for about an hour.  This has worked several times for me but no guarantee...Good luck