This article is for MacBook logic board component-level repair professionals, written by IT-Tech Online, the MacBook repair specialist in Melbourne, Australia.
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We will discuss MacBook power sequences from CPU/PCH shoots out PM_SLP_S5_L to all system power rails (except CPU power rail) are present. We will use the MacBook Air 13” 2015-2017 logic board schematics 820-00165 as references.