Boardview for the MSI MS-16J21 notebook mainboard, delivered in a small ZIP archive. MS-prefixed numbers are MSI's own board codes, and the full number on the PCB should match before you rely on the layout. After extraction, open the file in a boardview viewer such as FlexBV or OpenBoardView to locate components, follow nets, find test points and compare readings between sides of the board. It pairs well with a schematic of the same board when hunting a short or a missing rail.
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 @cynetitsolution. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip