MacBook Power On Sequences & PPBUS_GH3 voltage 1. PP3V42_G3H power rail creation. Understanding the PP3V42_G3H Power Rail In a MacBook, the PP3V42_G3H power rail is critical for the initial boot process. This rail powers essential components, including the System Management Controller (SMC) and memory. Checkpoint 1: PP3V42_G3H Power Rail at L7095 Inductor The PP3V42_G3H power … Continue reading MacBook Power on Issues and Troubleshoot