Small Excel spreadsheet with an uninformative name, NEW OK-1, which gives no model, board or content clue. At 12.2 KB it likely contains a list or table, possibly notes on tested firmware or parts, but that cannot be confirmed from the name alone. Open it in Excel, LibreOffice Calc or another spreadsheet program to see what it holds. Treat any board numbers or values inside as references to verify against the actual hardware and documentation before using them in a repair.
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 @technodev_bios. Enginerys does not host this file.