MSI boardview for desktop board MS-7C50, also identified as I3X0MS, packed into a 1.07 MB rar archive. The name states no retail model or revision, so confirm the MS-7C50 code printed on the PCB before using the layout. I3X0MS likely refers to an Intel 300-series chipset family, though the exact chipset is not stated. In a boardview viewer you can locate VRM parts, the BIOS chip and test points, and trace standby and main power rails to find a short or dead circuit.
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.