Layout file for the MSI MS-7B22 board, revision 3.0, in a RAR archive of 1.36 MB. The board revision matters here because MSI ships several revisions of this desktop board, so check the marking on the PCB before using the file. A boardview tool displays part placement, pin numbers and net connectivity, letting a technician trace power rails, probe test points, follow signals to the BIOS flash and find the source of a short without reverse-engineering the board by hand.
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 @BoardSchematic. 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.