RAR archive of 7.05 MB for the Dell Latitude E6540, Compal project VALA0, board LA-9414P revision 1.0 marked A00. The name does not list the contents, so extract it with WinRAR or 7-Zip and check whether it holds a schematic, a boardview or both. Compal designs carry LA-xxxxP numbers, and the board number with its revision printed on the PCB should match before you rely on the files for tracing rails, locating components or checking shorts. Treat any included firmware with care and back up the original chip first.
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 @laptopbios21. 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.