Boardview for the Quanta GD6 platform, board number DA0GD6MB8E0, revision 1, provided in BRD format within a 1.05 MB RAR archive. The DA0 prefix followed by the project code and MB is the typical Quanta numbering for a mainboard PCB, so compare it with the silkscreen before use. BRD boardviews load in tools like OpenBoardView or FlexBV after extraction and show component placement, pin nets and test points, which speeds up locating parts and tracing shorted or missing rails.
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 @alischematics. 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.