Here is a 975 KB ZIP for MSI MS-6746, identified only by brand and board number. Whether it holds a schematic, a BIOS binary or both is not stated, so extract and examine it before planning a repair. A schematic serves for tracing power circuits, locating components and checking suspected shorts, and a BIOS image is written with an SPI or parallel flash programmer depending on the chip. The MS-6746 marking and revision printed on the motherboard must match before any of it is used.
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 @IT_SERVICE_WORLD. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.