Boardview archive for the Compal board LA-5651P, platform code name NAV50, compressed as a 1.29 MB RAR; BV in the name stands for boardview. No laptop brand is stated, as Compal builds boards for several notebook vendors, so the LA- number is what to match. After extraction the layout file can be opened in OpenBoardView, FlexBV or a similar viewer to find component locations, pin nets and test points while diagnosing shorts or missing rails. Verify the board number and revision printed on the PCB before trusting component positions 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 @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.