Quanta N91D board documentation at revision A, a 1.06 MB RAR archive. No laptop brand or model is named, so check the PCB markings for a match. The contents are not listed, but such archives usually contain the schematic. N91D is one variant in Quanta's N91 family, alongside N91A and N91C, and the variants differ in circuitry. With the diagram a technician can trace power rails, identify regulators and locate shorted parts. A separate N91-D boardview may pair well with this file.
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.