Compressed RAR archive of 459 KB for the ASUS P8B75-M LE motherboard, an Intel B75 based micro-ATX board. The name gives neither the document type nor the revision, so open it to check whether it is a boardview, schematic or other service data. Files like these help technicians locate parts, follow power and signal nets, and trace no-power or no-POST faults. The LE board appears in more than one PCB revision, so compare the revision printed on the board with the one in the files.
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 @boardview. 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.