Quanta ZRC mainboard schematic, supplied as a 1.26 MB PDF. The file name gives only the Quanta project code, with no revision, board number or laptop model, so confirm the silkscreen on your PCB reads ZRC and compare the revision shown in the schematic title block. A diagram like this is the basis for diagnosing no-power and no-boot faults: follow the power-on sequence, trace standby and main rails, identify the PWM controllers and locate the EC and BIOS flash. Any PDF reader opens it, and text search helps find nets and reference designators.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @pepeelectronica. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.