Start at the DC-in jack and follow the 19V rail. Use a multimeter to verify it reaches the first and second MOSFETs. Locate "Always-On" Voltages:
The APW70 LAC391P appears to be a power management IC (PMIC) designed for portable devices. Here's a brief overview: apw70 lac391p schematic portable
Unfortunately, I couldn't find a publicly available schematic diagram for the APW70 LAC391P. Schematic diagrams are typically proprietary information owned by the manufacturer or designer of the IC. Start at the DC-in jack and follow the 19V rail
: Includes detailed diagrams for USB Type-C power delivery, HDMI 1.4, and the SMBus block for battery communication. Laptop schematic Common Troubleshooting Points apw70 lac391p schematic portable
