RAR archive of 572 KB for the ASUS K56CM laptop mainboard. The name gives neither the board revision nor the content type, so extract it first and see whether it holds a schematic, a boardview or firmware. With service data like this, technicians trace power rails, follow enable and power-good signals and find where a short sits on the board. Since ASUS boards for one model can exist in several revisions, compare the revision printed near the board code on the PCB with the files before measuring or replacing components.
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 @ITHINKHS. 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.