RAR package for the MSI MS-163A notebook motherboard, revision 1.0, about 939 KB. The file name lists no contents, so unpack it with 7-Zip or WinRAR to find out whether schematics, boardview data or both are included. MSI applies MS-16xx codes to its laptop boards. These documents help when tracing rails from the adapter input to the CPU and GPU regulators, checking enable signals and locating shorted capacitors. Verify the revision on the physical board is 1.0 before relying on part placement or values.
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 .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.