Schematic for Sony mainboard MBX-163, with MS60 in the name, likely the ODM project code for the design. The 1.04 MB PDF gives no laptop model or revision, so identify the machine through the MBX label on its board. Use the diagram to follow power-on sequencing, check regulator outputs, locate test points and find the component responsible for a shorted rail. Before relying on part values, make sure the PCB number and revision correspond to this document.
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 @schematicslaptop. 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.
Any PDF readerSumatraPDFFirefox / ChromeFlexBV (links PDF to boardview)