Signal sent from EC to the chipset/APU to release it from reset.
: The TI BQ25A charging IC fails to internalize its bootstrap charge pump. Pin 4 ( ACDRV ) measures 0V instead of the required ~25V. lac781p schematic top
The IC stabilizes and biases the isolation gates, populating the primary B+ rail across the board. Signal sent from EC to the chipset/APU to
The main 19.5V distribution line that feeds all major step-down Buck switching regulators on the motherboard. Phase 2: Always-On Power Rails (G3 to S5 State) lac781p schematic top