Small RAR archive, about 467 KB, named only Lenovo E50. The name gives no board number, revision or contents, so open it to see whether it holds a schematic, boardview or a firmware image. If it contains a BIOS dump, read and save the original SPI chip with a programmer before writing, and check the image size matches the flash capacity. If it is a diagram, compare the board number in its title block with the one on the PCB before using it to trace rails or locate parts.
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 @cyberlanelectonik. 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.