Schematic for the Sony MBX-202 motherboard under ODM project code M790, packed as a 777 KB RAR archive. Sony used MBX numbers for VAIO mainboards while outside manufacturers did the design work, so the M790 code is the key to matching ODM documentation. Open the PDF in any viewer to follow the power-on sequence, measure rails at the listed test points and identify parts around a short. Confirm that the board number and revision on the PCB agree with the title block before relying on values.
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 @generalschematics. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.