MSI MS-7677 motherboard documentation, revision 1.0, stored in a 1.35 MB RAR archive. The file name does not say whether it contains a schematic, a boardview or both, so extract it to see. MS-7xxx is MSI's in-house numbering for desktop boards and is printed on the PCB itself. Once the code and REV 1.0 are confirmed on your board, a technician can use the files to follow the CPU and memory power rails, check MOSFETs and controllers, and work through a no-power or no-POST fault.
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.