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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

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MacBook Pro won’t boot, missing a ferrite bead, anyone know the part?

My MacBook Pro 2012 mid 13” will not boot up. It keeps trying, the fan runs for a sec and the indicator light turns on, but almost immediately it shuts back down. I believe I’ve found a missing ferrite bead but cannot find the part number to replace it. Does anyone have a schematic to find this part?

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can you tell us the board number it will be on the logic board starting 820-

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Kaleb Williams looks like this board is a 820-3115 and the missing component is actually NOT a ferrite bead. It is reference designator R1982 which is a 10K ohm 5% 1/20W resistor in a 0201 package.

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Cheers for that mate, also would you know what condition the computer would be in without that resistor. Just hoping this is the reason my Mac won’t boot

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Kaleb Williams it could be related to your MBP not turning on. Of course, you do want to replace the resistor. It is part of the PCH DMI/FDI/PM/Graphics circuitry, in particular the GPIO29 rail which comes of U1800 system power management and connects SLP_LAN to ground

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