Sony VAIO VPC-L series all-in-one repair archive referencing Foxconn project M920. Foxconn designed and built a number of VAIO systems, and its M-prefixed project codes show up on boards and schematic title blocks. No MBX number or revision is given, so identify the board by its Foxconn marking before use. The 1.20 MB RAR likely contains the schematic. Use it to follow power rails, check standby and main power circuits, and locate components and test points during fault finding.
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.