Documentation for the Quanta SW1 mainboard, revision 1A, packed in a 1.05 MB RAR. No brand or model is given, so identify the notebook from the board marking itself. The archive most likely holds a schematic and possibly a boardview, the latter opened in OpenBoardView or a similar viewer to find part locations. These files support tracing power and signal paths, diagnosing shorts and checking the charger and EC circuitry. Verify that the SW1 code and 1A revision match the PCB before relying on it.
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.