Introdução
The first-generation 12" Retina MacBook has a design quirk that requires connection to low-voltage power after a repair. If this step is skipped, permanent logic board damage may result. This procedure is not required for 2016 and later models.
Connecting the Retina MacBook to low-voltage power requires a 5-Watt A/C adapter (like the kind that comes with iPhones) and a USB-A to USB-C cable, neither of which is included in the MacBook's original box.
Ferramentas
Nenhuma ferramenta especificada.
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Using a USB-A to USB-C cable, connect your MacBook to a standard 5 W iPhone wall charger.
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Plug the charger into a surge-protected A/C outlet.
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Wait until you hear the power connect chime (you should also see the battery charge symbol onscreen).
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Power on your MacBook by pressing the power button.
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Once the MacBook successfully powers on, you can disconnect the 5 W charger, and use/charge your MacBook normally.
This is quite scary. I wonder what the technical explanation for this behaviour is?
Is it safe to just power it up using the built in battery? And then once it powers up, plug in the normal charger?
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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2 comentários
I recently did an upper disassembly on my MacBook 2015 and was doing the steps for a low voltage power up but when I plugged the power in the MacBook made the startup noise for a second then restart and did it again in these short cycles. I’m wondering if I improperly did the start-up process or perhaps something else is going on?
What sort of logic board damage might happen if this step is not followed? One of our customers brought us his 2015 MacBook after attempting to replace the battery himself. The new battery is not recognized, and the computer shuts off after about a minute even when plugged in. Could this be the result of him not applying the low voltage power?
