Board layout file, marked BDV for boardview, for Wistron board number 08212-2, supplied as a 119 KB RAR archive. The name gives no laptop model, so match the number printed on the motherboard to confirm it is the right variant, since the 08212-1 and 08212-3 versions also exist. A boardview shows component outlines, pin nets and test pads, making it practical for tracing power rails, finding a shorted capacitor or locating a chip quickly. Open it with OpenBoardView, FlexBV or a comparable tool.
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 @cyberlanelectonik. 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.