Compressed RAR package of 952 KB named ms_7046M1, which follows MSI desktop board numbering for MS-7046, with M1 likely denoting a variant or revision. The name carries no brand field or chipset detail, so open the archive to confirm contents. Schematics for such boards help trace VRM, memory supply, chipset rails and power-on logic during no-post diagnosis. Confirm the exact board code and revision on the PCB, since variants under one MS number can differ in layout and parts.
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 @generalschematics. 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.