RAR archive of 2.59 MB titled with the brand Avertek, with no model, board number or file type given in the name. Because the contents are unidentified, extract it and inspect the files to learn whether it holds a BIOS dump, schematic or other service data. If it proves to be a firmware image, back up the original chip before flashing and compare the image size with the flash capacity. Match any board marking inside the archive to the actual PCB before using the data for 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 @hrtechno. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.