Sony MBX-189 mainboard schematic, project M760, revision 1.0, provided as a 2.82 MB PDF. MBX numbers are Sony's internal board identifiers, while M760 looks like a project code. No VAIO model name is stated, so check the MBX-189 marking on the PCB. Use the schematic to follow power rails from the adapter input, check regulator outputs, trace enable and power-good signals, and find component references when isolating a short or a no-boot fault.
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.
All sources (28)
The same file was posted more than once. If one link is dead, try the next.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.