Sony VAIO-style motherboard schematic for board MBX-266, provided as a 1.13 MB PDF; no revision is stated in the name. Sony labels its notebook mainboards with MBX numbers, which are printed on the PCB and are the key to finding the right documentation, since the retail model name can map to several boards. Use the diagram to trace power rails, follow the power-on sequence, locate parts around a short and check signals between chips. Confirm the MBX-266 marking and revision on the board before working from it.
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 @alischematics. 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.