While "LQV77" is not a laptop model itself, it is a primary source for finding schematics for brands like Acer, HP, Dell, and Lenovo Report: Accessing and Using Laptop Schematics via LQV77 1. Overview of LQV77 Resources
By following the schematic, you can isolate which power rail is shorted to ground, preventing you from replacing parts unnecessarily. Key Sections of the LQV77 Board lqv77 laptop schematics