RAR archive of 883 KB labelled only M9A0 MP, with no brand, model or contents given. MP usually marks a mass production release, and the M-prefix style resembles Foxconn project codes seen on other boards, though the name does not confirm the maker. Extract it with WinRAR or 7-Zip and check whether it holds a schematic, boardview or BIOS. Match the M9A0 code against the PCB silkscreen before using any diagram to trace rails or replacing parts based 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.
7-ZipWinRARThe Unarchiver (macOS)