Start by highlighting the +19V or DC_IN rail to see where the voltage enters the board and where it might be getting blocked by a shorted MOSFET or blown fuse. Common Issues on the LAH931P Board
Technicians frequently use the LAH931P boardview to troubleshoot: lah931p boardview
You can click on any pin (like a power rail) and see every other point on the board that shares that same connection. How to Use the LAH931P File Start by highlighting the +19V or DC_IN rail
Often related to the USB-C charging circuitry or the input MOSFETs. lah931p boardview
For the best results, use the LA-H931P boardview alongside the LA-H931P Schematic . The schematic tells you what the circuit does; the boardview tells you where it is.