Boardview for an MSI board numbered MS-V390, packed as a 1.06 MB RAR archive. The MS-Vxxx pattern matches MSI's numbering, commonly seen on its graphics card PCBs. Extract it with WinRAR or 7-Zip and open the board file in OpenBoardView, FlexBV or a similar viewer to locate components, test points and nets on both sides of the PCB. Confirm that MS-V390 and the revision printed on the board match before probing rails or tracing a short.
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 @cyberlanelectonik. 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)