BDV boardview for HP all-in-one desktops in the 20-C, 22-B and 24-G series, platform N91A, Quanta board DAN91AMB6D0. The DA prefix follows Quanta's numbering for boards it builds for HP. At 1003 KB, the file opens in Boardviewer, FlexBV or OpenBoardView and shows component outlines, nets and test points. Technicians use it to trace standby and main power rails, find shorted capacitors and follow display or USB signals. Compare the board number on the PCB before trusting the layout.
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 @boardviews. Enginerys does not host this file.
How to open a .bdv file
Text-based boardview produced by Honhan / Hon Hai test tooling, with lightly obfuscated content.