Quanta N91C schematic archive at revision C3A, 760 KB in RAR format. No laptop brand or model appears in the name, and the contents are not listed. The C variant belongs to Quanta's N91 board family, and the revision string should be compared with the PCB silkscreen. Technicians use such diagrams to trace power rails, follow the power-on sequence and locate test points. Do not mix it with N91A or N91D documents, since component placement and values may differ.
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 @IT_SERVICE_WORLD. 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.
7-ZipWinRARThe Unarchiver (macOS)