Boardview for the MN10AB motherboard, Inventec part 6050A2408901 at assembly revision A02, packed as a .BRD file in a 282 KB RAR archive. The 6050Axxxxxxx pattern belongs to Inventec-designed laptop boards, with the -MB-Axx suffix marking the revision. The name does not say which laptop brand uses it. BRD files open in OpenBoardView, FlexBV and similar viewers for locating parts, nets and test points. Match the 6050A number and A02 suffix on the PCB sticker or silkscreen before trusting placements.
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.