Boardview for the HP ProBook 440 G4, board code X81 with MB D, read as the mainboard at revision D, packed in a RAR archive. The X81 naming follows the Quanta project style used on these HP ProBooks. A boardview shows parts placement and net connections on both board sides, which helps locate test points, identify capacitors on a shorted rail, and find components named in the schematic. Open it in OpenBoardView or FlexBV and confirm the revision letter on the PCB matches D.
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.