Small RAR archive of 467 KB for the Lenovo E50. The name carries only the model, giving no board number, revision or content type, so extraction is needed to identify what it holds. Repair packages of this size usually contain a schematic in PDF form, used for following signal paths, measuring rails and finding faulty parts. Because Lenovo sourced boards from several ODMs, read the board code printed on the PCB and make sure it matches the documentation before relying on it.
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.