Small RAR archive of 46.5 KB labelled with project code 08532 and the suffix sb, without any model or file-type information in the name. The numbering follows the Wistron pattern, an ODM that produced many Dell notebook boards. At this size the content is most likely a compact firmware dump rather than a schematic or boardview, so extract it and inspect the files first. Confirm the board marking matches, read and store the original chip with a programmer, and only then flash the replacement 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 @schematicslaptop. 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.