Quanta BDBD boardview in BRD format, packaged in a 692 KB RAR. Quanta labels its laptop designs with short letter codes like BDBD, and the board usually carries a part number such as DABDBD-something, but the name states no brand, model or revision. Load the BRD file in OpenBoardView, FlexBV or similar to locate parts, follow nets and find probe points while chasing missing rails or shorts. Check the code printed on the PCB matches BDBD, along with its revision, before using it.
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.