Boardview for the Lenovo mainboard NM-A273, revision 1.0, carrying the ACLUA / ACLUB project codes in the Compal / LCFC naming style. BDV is a common boardview extension and can be opened in tools such as OpenBoardView, FlexBV or similar viewers. Opening it lets you click on a part to see its reference and connected nets, find test points, trace power rails and follow a short to the component responsible. Check that the revision printed on your PCB matches 1.0, since part placement can shift between revisions.
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 @schematiclaptopramkushwaha. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.