A TVW boardview for the board labelled NS-F331 at revision 1.0, compressed into a 210 KB zip. Files with the NS- prefix in this numbering family usually describe auxiliary sub-boards that pair with an NM- mainboard of the same number. Open the extracted TVW layout in Teboview or another viewer that reads the format to find parts, pin nets and test points while tracing a fault. Check that the number and revision silkscreened on your PCB match NS-F331 REV1.0 before trusting the placement data.
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 @vinafix_bios. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.