An archive of repair files for HP hardware (board 07239-1). Shared as “HP CQ77 - 07239-1.zip” — a .zip file, 24.5 MB.
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 @azvoltagemap. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip