Quanta X12A project files in a 1.48 MB ZIP archive, with the brand and contents not stated in the name. The letter-number code follows Quanta's platform naming, which shows up in the DA0 number silkscreened on the board. Depending on what is inside, you can use it to trace the power-on sequence, check for shorted rails or reprogram firmware. Check that the board marking matches, and keep a backup of the original chip contents before writing any image.
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.
Built-in OS tools7-Zip