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Reset PRAM 3 times (3 complete bong, flash, power off , restart cycles), that is keep P & R & Option and CMD pressed the whole time without taking your fingers off - obviously you also need to press power on button once with spare finger. Wait until you hear the 3rd 'bong' and also that the...- Yalnif
- Post #27
- Forum: Macbook Logic Board Repair Questions
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