If your customer's Acer Nitro 5 is completely dead (no power draws or shorting out the bench power supply immediately), the main 19V rail ( +19V or VIN ) is likely shorted to the ground plane.
When diagnosing a dead LA-F952P board, you must verify the voltage rails in chronological order using your multimeter and Boardview map. The fundamental power flow follows this path:
An open-source alternative favored for its clean interface and cross-platform support. Diagnostic Checklist using Boardview