Archive for Sony motherboard MBX-185, project M730, about 1.49 MB; no revision is given in the name. The RAR most likely holds the schematic for this VAIO board. Use it to trace the path from the DC jack through the charger and voltage regulators, check rails at test points and identify the part responsible for a short or missing voltage. Look up the revision in the drawing title block and match it, along with the MBX-185 number, against your board 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.