Boardview for the MSI MS-7B79 motherboard, revision 3.0, packed in a RAR archive of about 1.29 MB. MS-7Bxx is MSI's own numbering for desktop mainboards, so the board code is silkscreened on the PCB near the slots. A technician opens the extracted layout in a boardview viewer such as OpenBoardView or FlexBV to find components, trace nets and probe test points while hunting shorts on VRM or standby rails. Confirm the board carries REV 3.0, since MSI changes placement between revisions.
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.