MSI MS-7511 motherboard archive for version 1.0, the earliest issue of the set, in a 1.03 MB RAR. The name gives no detail of the contents, but it is probably schematic documentation for that build. MSI prints the MS number and version on the PCB, so verify you have a 1.0 board, since versions 1.1 to 1.3 may change parts. Use it to follow the power circuits, locate parts and compare voltages when diagnosing a board that will not start.
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 @schematicslaptop. 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)